I think I covered this the last time you posted, but swearing isn’t a sign of maturity. It’s generally a sign of limited vocabulary.

Also, “being treated like a child” is an interesting statement. I know I tend to go into any conversation with someone of ANY age treating them like they may be totally ignorant of the topic at hand, but are likely bright enough to pick it up pretty quickly. Age rarely factors into it.

But if someone appears to be attention seeking and inauthentic, pretending they know things/people they don’t, and trying to act how they think someone else wants them to act instead of just being themselves… that’s when the “OK buddy” comes out. It means “I’ve discovered I can’t have a real conversation with you and you’ve used up my patience to coach you along.”