Samurai Jack S5, Primal S2 and UWE were polarising on /co/. Each of those seasons received some detailed criticism here. Yet they all have 100% Tomatometer.

On a sidenote, I dislike the way Rotten Tomatoes scores work. In most contexts outside that website, red color is the universal sign for "no/wrong/denied" while green means "yes/correct/approved". Because of that, I always struggle to remember that the site uses a red symbol for good movies and a green symbol for bad ones.