Is the tribulation in religion -where one sees everything as evil and forbidden, contrary to what others see- a sign of Allah's curse and a bad end, or is it due to the corruption of the parents?

Allah may test a servant in their faith to reveal their sincerity and adherence to it, or due to their shortcomings and excesses in it. Not everything you hear or see is evil; rather, goodness is predominant, though Satan may portray the opposite to you. This is not a sign of Allah's wrath or curse.

A Muslim must acquire knowledge to distinguish between lawful and unlawful, and to do what pleases Allah and avoid what displeases Him. Allah does not punish a person for the corruption of their parents, as stated in the Qur'an: "And no bearer of burdens will bear the burden of another."

It is incumbent upon the afflicted to learn and act upon their knowledge, to be patient in Allah's religion, and to adhere to the teachings of the Sharia.