I like Fast and Furious

I've only finished the campaign of one COD game - COD 4 Modern Warfare. The game was OK but the campaign on veteran difficulty was too hard for me and I struggled to finish it. It may be the hardest game I've played.
I've played multiplayer a lot on other COD games but I don't think they are anything special.

Well, then just enjoy it and ignore the haters.  

I would be less hesitant to get into the series if they sold the new iterations as expansion packs instead. Of course, Activision wants to squeeze as much as possible from the consumer, so that's never going to happen.

I like them, but I don't buy them yearly, so I don't have COD fatigue like other gamers.

Bad? No. The multiplayer is still tons of fun. However, after COD WAW, I found that they resorted to the same old tricks far too many times, and so I have stopped buying Call of Duty games after Black Ops. It's just boring now, to me.

If it were bad,it wouldn't sell so well every year, simple as that.