You know what I think?
I think the people fighting against the show are trying too hard to discredit a show that doesn't even take itself seriously. Yeah, it has still loops and plenty of nothing-time, but it doesn't completely trash the charming and exaggerated polygon-centric art style and it keeps to the feel of the manga. No, it isn't some superb godsend animation, but it's wacky and fun, which is exactly what it intended to be. It's become insanely popular upon release and people who didn't like it (2:3 ratio?) need to tell everyone "No, why do you like this, it's bad" and exactly why they should feel bad for watching it. The humor is pretty garbage so far, but it doesn't keep the show from being incredibly fun to watch. It's a simple episodic cartoon; it isn't meant to have some sort of huge underlying plot or gorgeous animation as people expect of popular anime nowadays. I could really care less what technical aspects are supposed to make it bad, I'm fukken watchin it anyways.
I also think the people fighting for the show are trying too hard to discredit the people fighting against the show. Instead of just enjoying the show just because they like it, they try to find good aspects that will beat back the opposition. Honestly I don't think it's needed. If someone goes "this show has shitty animation" and then you point them towards a specific scene where you think it was good, it isn't going to change anything. 'Against' are looking for responses to their criticism, and 'For' are looking for affirmation to why they like it. That's how it'll be, that's how it'll always be.
Although I guess I could say the same for any other anime and I'm sure I'd be a hypocrite and tell people why they should feel bad for watching it, but something that gains an absurd popularity for doing nothing technically special is bound to have arguments like this. Not telling people to back off on criticism or stop defending what they like; discussion is cool. Just saying no need to get riled up about it.