I've just started reading a book on CBT[0] that I have been really enjoying so far. I think the gist is that much like logical fallacies, there exist cognitive fallacies that our brains start using that alter the way we perceive reality in a negative way.

Here's [1] a kind of silly example of it in action over on the Overwatch subreddit.

[0] https://www.amazon.com/Feeling-Good-New-Mood-Therapy/dp/0380...

[1] https://www.reddit.com/r/Overwatch/comments/85qmul/my_wife_i...