From what I understand, the show had a decent idea but the people making/supporting it didn't have enough hope that the concept would be strong enough to grab viewers so they ramped up the fanservice and comedy. For example, the character above had a more modest chest in original plan but was revamped to apparently have macromastia or something because wow

Personally, I have no qualms with large breasted characters because, hey I've had some close female friends who had large breasts and if written correctly it could be interesting (also, I'm a dude so of course lol). However, it does look like she's just there for fanservice which again isn't bad for me, but I definitely can see why a lot of people would be turned away by it.