maybe MGE players are different since i played it at all, and definitely an armchair take, but:
1. MGE is implied to measure ur pure individual skill
2. MGE is 1v1 and competitive so per (1) wins should show skill superiority of the winner
3. MGE is ultimately very flawed as a 1v1 competition, so unwritten rules are prevalent
4. ppl who play MGE too much place too much of their self-worth on their performance in MGE
this leads to MGE mains losing, feeling primally dominated to some degree, but being left with an outlet to make excuses and offload their anger onto the enemy player. beyond this theres also the total social disconnect of you not even caring about the result of the games. even if they didnt get mad, their reactions to winning or losing are probably pretty foreign to someone who just uses the mode to warm up their aim
my question is less "why are ppl who play MGE as a hobby so mad all the time?" and more "what makes ppl play MGE as a hobby?"
cos tell me you wouldnt be a bitter and angry person too if you primarily played MGE as a hobby