What is the ruling on remaining in a non-Muslim country where Muslims experience humiliation and degradation, despite having the freedom to perform religious rituals, given the difficulty of returning to the home country due to the children's education?

The basic principle is the permissibility for a Muslim to reside in any place where they can practice their religious rituals, and feel secure concerning themselves, their wealth, and their families. If the harms of staying conflict with the harms of returning, then it is obligatory to weigh them and commit to the lesser of the two harms, because the Shariah is founded upon achieving benefits and averting harms. A Muslim must uphold their dignity and freedom, and not humiliate themselves by residing in a place or moving to another where they would be dishonored.