Unpopular opinion, I kind of like Mr. Enter. He's not perfect, or even great for that matter, but the fellow can manage to crack a good joke or two, he usually picks interesting stuff to review, and he's improved over the years, both in editing and criticism.
If we're talking about shitty cartoon spergs, I would have to point my finger at Jem Reviews. The guy has pretty much every problem with cartoon spergs, condensed into one package. He doesn't pick new or unique stuff to review, sticking with Family Guy, Spongebob and Teen Titans Go, he gets upset over things that are "mean spirited" and he hates youtube's copyright laws with a burning passion. Say what you will about someone like Phantomstrider, but I rarely see him bitch over copyright, even if all of his videos are the same.