This question is so broad. There are quite a few things that happened to me, that I feel affected me mentally. My ex-girlfriend cheating on me and having a hickey on her neck from someone else when I was 17 was a big one. The crazy part is, it was the same day she met my mother for the first time, so I was really mad. When my mother noticed the hickey, I acted as if, I did it.
I also think my first loss as a professional fighter killed me mentally…I wanted to be like Mayweather and stay undefeated, so when that first loss happened, I felt like a failure. These are just the first two that come to mind. There’s probably a lot more if I sat and really thought about it…but this shows just things that others can relate to, that are such “normal” parts of life.