I love writing and I get great joy from well written work, and if I find typos or errors in a book I'm very put off by them.
This, on the other hand, is a shitposting website. Anyone who shows linguistic pretentiousness while being one click away from fucking PPB is a nerd and should be bullied. Also not everyone's first language is English and not everyone has had the opportunity to study it to the same level.
First rule of knowing something: it doesn't make you better than people who don't!
Also language is flexible and constantly evolving. If the listener understands the speaker, the language was correct.
(anyone watch Simon Roper's videos on YouTube? Dude studies linguistics of English from all periods of history, but he's so chill about it)