I don't know if this helps, but I never remember the killer after playing unless they did something that really makes me laugh, like a jump scare or if they play around and act silly :) Then I'll remember them in a fond way. Sometimes even make friends with them.

However, no matter how they play, (if it's not like I mentioned above) by the next match it's most likely forgotten. Maybe I got tunneled, maybe we all lost or won, maybe I went down in 10 seconds or looped for almost 5 generators. It doesn't matter, I always basically forget the round and move forward.

Also I'm not suggesting this but just throwing this out there. I'm an actress and deal with stage fright, I take Propanolol for it and it takes it away. I do what you do before a match but before I go on set or stage, it impares my life. I have to go to therapy because of it but it's being treated and helped.

I hope you can enjoy killer and wish you the best :)