Is it enough reason?

I meet him July this year, everything about him is cool. My only worry is his fanatical support for arsenal which I consider the worst club on earth.

He keeps disturbing me of how his club will win the league, but whenever they lose he becomes super depressed and aggressive.

We have talked about this many times and he has sworn to change.
But this night he came back very late and was making so much noise, shouting and yelling
Then I googled scores and saw that his club lost today

I can't take it anymore
He is not the first guy I have dated that loved football. His own is that when his club loss it affects him very bad.

I have even suggested he should stop supporting arsenal but he won't listen.
After this night rubbish he just displayed I'm thinking of calling it quits.

Am I overreacting??