Is it considered forbidden for a wife to seek divorce in this situation, and would there be sin for doing so, especially with the family's refusal of divorce and their insistence on enduring this marriage as a punishment? And is it true that repentance and seeking forgiveness are not accepted due to the abundance of past sins?

Allah the Almighty is more merciful to His believing servant, and everything He decrees for them is good. Calamities may be for the elevation of one's status or because Allah intends good for them. Do not despair of Allah's mercy and His acceptance of repentance, for He loves those who repent and forgives all sins, transforming bad deeds into good ones. Therefore, have a good opinion of Him and increase your acts of seeking forgiveness and supplicating to Him. If you have wronged your family, seek their forgiveness and ask for their pardon, and return any financial rights. It is hoped that Allah will bear their rights on your behalf if your repentance is sincere.

Regarding your situation with your husband: He is not permitted to practice coitus interruptus (withdrawal) without your permission, and his insistence on it is a harm that allows you to seek divorce. Your money and salary are your right, and he is not allowed to take them without your permission. He has the right to prevent you from working if it was not stipulated before marriage, or to stipulate an amount from you in exchange for permission. You have the right to a suitable independent dwelling, which is an obligatory expense, and his failure to provide it allows you to seek divorce. It is not permissible for you to remain outside your husband's home without his permission, except if you fear for yourself or to seek assistance. You are not obliged to obey your family in staying with your husband as long as you are being harmed.