That's honestly so lame to say, imagine being against colloquialisms and slang which is literally the best part of language. I get it I roll my eyes at it too sometimes but mostly when it's disingenuous or pretentious. For example some middle class white kid talking like a gangster that shit is cringy.

Whenever I see someone talking like this I always think it's probably some teenager somewhere talking like this online because they think it's cool.