That's some real ish right there.
I have no issue with the rate at which characters are introduced; Mikeya, glasses and senpai were early intros to have a high lofty goal to reach toward and they won't be the ones he interacts with the most at present. So with them out of the way we now get to the characters he'll be in class with and interacting with. It's only been 11/12 chapters after all so the intros are still ongoing but I think people may be trying to put the archetypes from Jitsu wa on these characters too fast being like "Here's the Pres so she'll be in his main group, here's the perv, etc" instead of letting his friends accumulate naturally