When I got deducted marks for a submission issue recently on an otherwise perfect project after being made fun of by a prof for going way above expectations it was my absolute breaking point.

However, the only thing keeping my head above water is the thought of one professor who passed me in a course a while back when I probably didn't deserve it, but who knew I was hurting really badly. I'd actually go as far as saying her passing me during that time saved my life. She gave me someone to look up to for the first time and my grades have improved a lot since then. Sometimes when I get my exams back now I think to myself, "there must be a mistake, there is no way I got 92%." When I think the world is a bad place I think of her. I encourage you to find something similar to remind yourself of the good in the world.