Bo3 really isn't a bad game TBH.
I played it a bit with my friend and I think its a lot better than Advanced Warfare which wasn't even bad either.
But yeah, I do prefer the Battlefield games over CoD. I guess they both appeal to different kinds of players.
Being in a somewhat realistic modern battlefield setting is super cool to me but just doublejumping over people with shotguns and laser rifles isn't.
I say try out a Battlefield game. If you don't like it then just return it and buy something else.