It isn't necessarily a "good" series in the sense of being a masterpiece, but it IS fun to watch.
Too many anons are incapable of fun, that's all there is to it. They can't just sit back and try and have fun. They always have to have DEEP and THOUGHT-PROVOKING anime all the time.
These anons are simply killjoys who simply can't enjoy a series simply because it's fun, even if it is fucking stupid.