Eh... Even as a grizzled hentai connoisseur who considers himself pretty damn open-minded about this sort of stuff, even i find that the show is definitely...off in the underage lewding department. The show has a running gag about how her kindergarden classmate wants to fuck her (vid related). It's creepy. The creators know exactly what they're doing and who they're trying to appeal to, they've just given themselves enough room for plausible deniability.
I think it's even worse when it really does come across as loli-bait without admitting that's what it is and trying to kind of hide behind the "lol, it's just a joke, bro" excuse. I'd honestly probably be less put off if it was just straight up loli yuri porn. At least that's honest, wouldn't hit the mainstream, and actually could have a bit of room left over to go somewhere with it. When you relegate it to a gag to do the pervert appeal + plausible deniability thing, which seems to be pretty popular these days, you're left with a big pile of mildly uncomfortable nothing. Not vanilla enough to not raise some red flags, but not committed enough to be an honest and genuine exploration of an uncomfortable topic, which are often some of the greatest works of art. You're just left in this crappy middle-ground where it's off-putting, but also totally meaningless.