Why do people hate black ops, and prefer modern warfare 2?

The campaigns brilliant, zombies is beyond epic, grenade launchers are balanced, there's more Easter eggs, guns are way better, graphics are better, hackers are banned, games never crash, there's wager match, weapon upgrades are better, there's a theatre mode, games are never hacked, updates come constantly, there's cool guns modern warfare didn't chose cool guns like: full-auto famous, mac-11, galil, ak74u, ballistic knife..... , the maps are very good, we are getting more maps than modern warfare, there's no boosters, you can record and post videos on YouTube way easier. This makes no sense!!