Will my repentance be accepted for the mistakes I made against Allah and people, including my cursing of Allah and His Messenger, knowing that this was due to my severe psychological state and the injustice I was exposed to, and are there conditions for the acceptance of this repentance?

You must mend your relationship with Allah and seek His help through worship to rectify your affairs and protect yourself from injustice. Insulting Allah and His Messenger is an act of disbelief (kufr) that expels one from the fold of Islam, by scholarly consensus, and no excuse is accepted for it due to ignorance or anger. Allah accepts the repentance of the one who insulted Him if he repents sincerely. This is indicated by His (the Most High) saying: "Say to those who have disbelieved [that] if they cease, what has previously occurred will be forgiven for them" (8:38), and "And it is He who accepts repentance from His servants" (42:25). You must frequently seek Allah's forgiveness (istighfar), perform righteous deeds, learn about Tawhid (monotheism), and associate with good people. It is also advisable to keep good company and consult psychiatrists.