Of course TF2 will have more players. How does that make it dead? Plus I left-- took a break from Mw3 to play Skyrim.. does this mean I'm never going to play it again? Your arguments are shit.
Take a look at the stats:
TF2 has more players at this time, but not overall for Mw3. And you can't compare Skyrim to Mw3. They're 100% different games. Reason Mw3 might be less active, is because Skyrim came out slightly after.
Oh look at that, every one of your arguments disproven.
It's not 90%. I would say 1/4 games on ground war has a h4x0r on a bad session. The amount of people seriously playing fps games is solid. There are a shit ton of games coming out right now so obviously people will move, but those are mobile players. dead...hardly, even with the enormous flaws. The game is fucking fun.