Is it permissible to renounce the guardianship of one's parents due to their improper upbringing of their children, and what are the conditions for this, and who has the right to do so?

Parents must raise their children with a sound, comprehensive upbringing. If they fail to do so, they must be advised and reminded of their responsibility. Guardianship is not removed from parents as long as they are sane, even if they are not righteous or are disobedient, according to the majority of jurists, unless their guardianship is revoked by the paternal grandfather or the ruler. Children must be dutiful to their parents, and relatives must cooperate in raising the children in righteousness, piety, and uprightness.