Nothing. Basically every single thing in this game I hate, yet i still have wasted around 15 days of my life playing it.
^This
But in all seriousness. I do like the killstreaks. However, they should have disbursed some of them for doing objectives. Like getting a predator missile for capturing two flags. Another great thing that they could have added would have been seperate killstreak settings for each class at 10th prestige. Everything else is pretty much downright terrible. The lag, the stupid commando perks, the model 1887s(Which are STILL strong after the patch), one sided maps and spawn killing. Just everything EXCEPT the killstreaks are terrible. Don't even get me started....