Cringer

(Noun)

A person who cringes about everyone and everything for the sake of cringing.
A person who talks people down, because they don't understand their passion.
A person who thinks everything thats not ordinary and/or is passionate is cringe.

"I crochet as a hobby now, it's a lot of fun."
"Crocheting is for old people, you're so cringe!"
"Oh, don't be such a cringer.."