I agree that the line delivery sounds overly performative, but in most of the cases that doesn't feel like bad acting to me, it just feels like the way that young hip are constantly, like, putting on a front to one-another. The writing supports that too: a lot of the conversations involved the characters trying to, like, riff off each other and pretend that they're not anxious neurotic weirdos. Dev almost never says anything sincere in the entire show, right?
I probably wouldn't read so much into it except, like, this is clearly the main theme of the show. Like, why is it that every episode has a scene of Dev workshopping a text reply to someone because he's worried about how it'll come off?