I don't get it, why is it that the pages are ugly a reason to consider it "the bad guy"? I installed this extension before, I didn't keep it because it didn't

I don't get it, why is it that the pages are ugly a reason to consider it "the bad guy"? I installed this extension before, I didn't keep it because it didn't had an option to silence events notification, what I was looking for, but it didn't seem bad