Misomaniac
Noun (Uncountable)
1-Someone who hates everything and everyone.
2-Someone who shows hatrey and contempt to everything and everyone. Feels that everything is worthless/beneath consideration.
He’s such a misomaniac ,he complains about everything !
Why do you hate all my friends, are you a misomaniac ?
I discovered that I’m a misomaniac , I’m disgusted of all society.