I didn't know COD employed 12 year olds...
In all seriousness, not everyone enjoys multiplayer. Take me for example. I am terrible at FPSs. Just awful. I don't play FPSs multiplayers by myself because I don't enjoy it. I have bought COD because I generally enjoy playing the campaign. I got attached to some of the characters, I've enjoyed shooting shit, but have I played the MP? No. Why?
1. As stated above, I'm terrible at FPSs, therefore I don't have fun when I play alone. With friends it's a ball, by myself not so much.
2. Bad player experience. Seriously, other gamers have ruined a MP game for me.
3. Lag. I can stand it for a while, but when I play a game I don't want it to be freezing when I'm getting into it. MAkes
But yeah, I get where he's coming from. I can see how irritating it would be if you worked months on a game and not everyone's experiencing it :/ Like making a cake for a party and only half of the attendees tried it.