I'm now at the age where once I discover current teenage slang it makes me irrationally angry

I admit I talk slang sometimes, I just don't care though. Also not trying to argue, these are just my thoughts, I believe language changes over time, there's really no proper language. The proper language is a rumor started by puritans when they wanted to wipe out Native Americans and tried to establish English as the prim and proper stuck up version of language.