Specifically, why are the reviews either "love it completely" with a rating of 10/10, or do they hate it, with very little in between? Just think about that one a while.
I, for one, hate this show. The writing is boring, the jokes are stale and ones you've heard for ages, the acting is unimpressive and, oh, good God, the laugh track! Laughter for everything! Not even just for jokes! It's supposedly live but that makes sense, since the laughter sounds very forced, and not genuine at all.
What's worse, I see nothing redeeming in this show. It's simply one of the least valuable shows I've seen in a long time.