Is a person considered perverted and among the people of Hell, and will his repentance be accepted if he consistently inserts things into his anus, then repents and returns to this act?

This act is forbidden and reprehensible; it is an abnormality that contradicts natural human disposition (fitra), manhood, and chivalry. One must hasten to repent to Allah by abandoning the sin, regretting it, and resolving never to return to it. Repentance is accepted, Allah willing. Seek Allah's help and do not despair. Beware of Satan's attempts to discourage you and make you lose hope. Deepen within yourself the feeling of manhood and embody the ethics of men. Stay away from bad company, choose righteous companions, and connect your heart to mosques and gatherings of knowledge and remembrance. Increase good deeds and occupy your free time with beneficial activities and exercise, along with frequent supplication and seeking Allah's help.