The Acceptor of Repentance, The Ever-Relenting, The Acceptor of our Return.
Allah سُبْحَٰنَهُۥ وَتَعَٰلَىٰ is At-Tawwab (in Arabic: ٱلْتَّوَّابُ), The One who beckons for our return. He repeatedly turns mankind towards repentance should they journey temporarily on the wrong path. Allah is lenient and restores grace to those who repent and forgives those who seek forgiveness.
From the root ta-waw-ba (ت و ب) which has the following classical Arabic connotations: to return, to return to goodness, to repent, to be restored, to be rewarded for deeds, to be repeatedly summoned or called.
This name of Allah سُبْحَٰنَهُۥ وَتَعَٰلَىٰ, At-Tawwab, means the acceptor of repentance. This name makes an appearance in 11 different verses of the Qur'an. Now, being the acceptor of repentance is the most commonly understood meaning of this name. This is what is meant by seeking Tawbah, i.e., you return to Allah سُبْحَٰنَهُۥ وَتَعَٰلَىٰ asking for forgiveness. But this misses an important quality of what it means to be At-Taawab. The root of both these contains the idea of turning, i.e., changing directions to something else.
Allah سُبْحَٰنَهُۥ وَتَعَٰلَىٰ is Al-Tawwab not just in the sense that we turn to Him. But for our prayers to be heard and our sins to be forgiven, He must turn to us, allowing for repentance. It is within reason to see how Allah سُبْحَٰنَهُۥ وَتَعَٰلَىٰ does not need to turn to those who sin. They often willingly engaged in disobedience and defiance, searching for pleasure in worldly pursuits. Why should Allah سُبْحَٰنَهُۥ وَتَعَٰلَىٰ turn to this servant who knowingly transgresses against Himself? But yet, Allah سُبْحَٰنَهُۥ وَتَعَٰلَىٰ in His infinite mercy, kindness, and grace, turns to His servant. He listens to his sincere repentance, and He forgives.
Wa iz qaala Moosaa liqawmihee yaa qawmi innakum zalamtum anfusakum bittikhaa zikumul ‘ijla fatoobooo ilaa Baari’ikum faqtulooo anfusakum zaalikum khairul lakum ‘inda Baari’ikum fataaba ‘alaikum; innahoo Huwat Tawwaabur Raheem
Yusuf Ali Translation:
"And remember Moses said to his people: “O my people! Ye have indeed wronged yourselves by your worship of the calf: So turn (in repentance) to your Maker, and slay yourselves (the wrong-doers); that will be better for you in the sight of your Maker.” Then He turned towards you (in forgiveness): For He is Oft-Returning, Most Merciful." — (Qur'an 2:54)
Alam ya’lamooo annal laaha huwa yaqbalut tawbata ‘an ibaadihee wa ya’khuzus sadaqaati wa annal laaha huwat Tawwaabur Raheem
"Do they not know that it is Allah who accepts repentance from His servants and receives charities and that it is Allah who is the Accepting of repentance, the Merciful?" — (Qur'an 9:104)
The Prohet Muhammad ﷺ describes the lowest people in paradise and how on the day of judgement it would be said:"Present his minor sins to him, and withhold from him his serious sins. Then the minor sins would be placed before him, and it would be said: On such and such a day you did so and so and on such and such a day you did so and so. He would say: Yes. It will not be possible for him to deny, while he would be afraid lest serious sins should be presented before him. It would be said to him: In place of every evil deed you will have a good deed. He will say: "My Lord! I have done things I do not see here." I indeed saw the Messenger of Allah laugh till his front teeth were exposed." 
Guilt is an interesting emotion. It can go two ways, (1) destructive and (2) instructive. If we are not careful, the constant repetition of something we know is inherently not good for us or is immoral will cause guilt to fester. It's like a built-in alarm siren that's shouting to change course. If it's ignored, it can erode self-confidence, self-esteem, and overall self-worth. If the action which originally caused guilt becomes normalized, then we may fail to recognize the damage it's causing. The one who sins and no longer fears Allah سُبْحَٰنَهُۥ وَتَعَٰلَىٰ should be most worried. This person may have developed a deep-rooted belief that they will not have to answer to anyone as they face no serious repercussions for their misdeeds.
In their case, it would be best to read the Qur'an and learn about the warnings and punishment of the afterlife to re-instill this fear. He is merciful and turns to His servant, He gives us the chance to meet him halfway, but Allah سُبْحَٰنَهُۥ وَتَعَٰلَىٰ is also just. Being able to admit your faults and harbor guilt is a beautiful sign of your belief and dedication to Allah سُبْحَٰنَهُۥ وَتَعَٰلَىٰ. It is a sign of your iman (faith). Don't let guilt transform into self-hate, don't ever think it's too for you. At any given moment, you can change. The next nine years don't have to look like the previous nine. "Allah wants to accept your repentance" (Qur'an 4:27). It is never too late to seek the forgiveness of your Lord.
Anas bin Malik narrated that the Messenger of Allah ﷺ said: “Allah, Blessed is He and Most High, said: ‘O son of Adam! Verily as long as you called upon Me and hoped in Me, I forgave you, despite whatever may have occurred from you, and I did not mind. O son of Adam! Were your sins to reach the clouds of the sky, then you sought forgiveness from Me, I would forgive you, and I would not mind. So son of Adam! If you came to me with sins nearly as great as the earth, and then you met Me not associating anything with Me, I would come to you with forgiveness nearly as great as it.’” 
Fatalaqqaaa Aadamu mir Rabbihee Kalimaatin fataaba ‘alaihi; innahoo Huwat Tawwaabur Raheem
"Then Adam received from his Lord [some] words, and He accepted his repentance. Indeed, it is He who is the Accepting of repentance, the Merciful." — (Qur'an 2:37)
Illal lazeena taaboo wa aslahoo wa baiyanoo fa ulaaa’ika atoobu ‘alaihim; wa Anat Tawwaabur Raheem
"Except for those who repent and correct themselves and make evident [what they concealed]. Those – I will accept their repentance, and I am the Accepting of repentance, the Merciful." — (Qur'an 2:160)
We may see someone we know messing up, and their world may come crashing down on them. Some will abandon their side because they don't agree with their ways, so they try to create distance between them and that person. Now, each person's case is unique, and we're not advocating for people to sympathize with abusers or put up with harmful or toxic relationships. But if you care for that person as a friend, we should try (in whatever way they allow it) to be part of the recovery process. To be part of the core support group to try and help build back better.
Narrated Anas: Allah's Messenger ﷺ said, "Help your brother, whether he is an oppressor or he is an oppressed one. People asked, "O Allah's Messenger ﷺ! It is all right to help him if he is oppressed, but how should we help him if he is an oppressor?" The Prophet ﷺ said, "By preventing him from oppressing others." 
We live in a time where we are fast to point fingers, where people are not allowed to publicly make mistakes. But if we wish to share the connection in this divine name of Allah سُبْحَٰنَهُۥ وَتَعَٰلَىٰ as being At-Tawwab, we should turn to people in kindness just as we want Allah سُبْحَٰنَهُۥ وَتَعَٰلَىٰ to be kind to us, even when we are in the wrong. It was narrated from Anas bin Malik that: The Prophet ﷺ said: "None of you has believed until he loves for his brother what he loves for himself."