And animation quality does not necessitate if an Anime is good or not. People who believe that animation quality determines how good an anime is are incredibly pessimistic.
I would never watch a show that has terrible animation quality. Take RWBY for example (not saying it'snecessarily an anime, but you still get the point), the animation is so bad thatI can't get very far into it without developing eye cancer. Quality of art/animation is definitely a reason to raise/lower a show's score. That'slike saying the OST or score (music) of a show doesn't effect it overall.
I'd also like to mention I'm not trying to say BC is S-tier or anything, because by no means is it 'great'. It's a 7/10 at BEST.I'm just saying it's not as bad as people make it out to be. The manga on the other hand is actually pretty good though and the show doesn't serve it justice at all.