The reviews of this game make my head hurt

People are saying this is the absolute best modern COD or that its one of the worst games in the series history.

What causes this divide?

Is it only good for SND while TDM sucks?

I recently bought the game, its my first multiplayer cod ever so I have nothing to compare it to and determine how good or bad it is.

I love the gunplay, movement, and graphics but im not a fan of the maps, could the maps really be that bad that it warrants labeling this the worst COD?