No, it’s not how to fit in. I don’t think calling them bizarre is going to help the situation though. They’re not bizarre, they’re just looking for approval the wrong way.
I think it’s probably more to stand out in a cool way, but it’s still not going to happen like this. The problem with “cool” is that it’s nebulous and there’s no formula for it. I would not be able to be cool while obviously faking an accent, but someone who’s really cool might still be able to pull it off. Hell, I have a genuine American accent in another country (a pretty light one) and I can’t embrace it enough for it to be cool.
What’s really hard to learn is that OP’s not going to be cool until OP is cool with themselves, and that’s difficult to do when surrounded by people who don’t think you’re cool. That’s why most people get cooler when they leave high school, and that’s also why people tend to get nicer.