What are the reasons for the prevalence of psychological problems such as depression, isolation, suicide, and sins among youth, and the decline in morals among some religious individuals?

Salvation from tribulations at the End of Times is achieved through faith in Allah and the Last Day, and by treating people as one wishes to be treated. Muslim narrated from Abdullah ibn Amr that the Messenger of Allah, peace and blessings be upon him, said: "Whoever wishes to be moved away from the Fire and admitted into Paradise, let his death overtake him while he believes in Allah and the Last Day, and treats people as he wishes to be treated." Al-Nawawi mentioned that this is an important principle that must be given attention, for if it diminishes, faith decreases. Thus, the rectification of the latter part of the Ummah will be by that which rectified its first part. And Islam is a clear proof for all.