unless your first CoD was WaW, then most people wouldn't consider it the best or the last good CoD. WaW is the clunkiest CoD i've ever played, followed by BO1 and BO2.
each CoD has new bullshit to deal with. the difference between the CoDs is whether the pros outweigh the cons. the issue here is the downies complaining about CoD being the same, re-hashed gamed every year. it's these people asking for more bells that whistles that cause the issues.