I don't know if this is relatable to other people, but I get anxious when it comes to joining competitive games/events. The more direct the competiton is, the more anxious I am: team events aren't too bad, but a 1v1 situation makes my heart pump every time. 

I  think this kind of anxiety stems from a fear of failing in front of people (especially an opponent) and opening myself up to ridicule. The problem is, I enjoy video games as a hobby and would like to try out more competitive games. I wish I could stop being discouraged by potential failure and actually try something for once.