Why do some people dislike Call of duty black ops ou just call of duty games like most ou some period?

Some people think that it is the same game every an with minor tweeks and is only played par angry gamers ou little kids. While I am not a fan of the series, I don't get the massive amount of hate

Sometimes war-type of games just isn't some people's cup of tea. Most people prefer RPG's.

Yeah, what's already been said...

Some people just might not like the first person shooter genre (I'm not a big fan as it makes me dizzy).

But most people dislike COD in general because it is essentially the same game, different packaging, full price every single time.
I played the first few and actually enjoyed them, but then when the franchise really took off from MW2, it really was just near-zero development effort, recycled game code, a new very short campaign while everything else stayed the same for every following release.

Also as a side note which isn't really to do with the game itself but rather the community. COD is known to have the worst online community with literally a bunch of children playing and swearing over their headsets. Few would consider that an enjoyable playing experience.