Grenades are the problem? Really that's what your problem is? How about the imba guns, the perfect camp spots, poor map design, the imba perks and knife and just everything. The whole game is trash. MW1 is the only decent one. Also you shouldn't be able to fly across a map to knife someone.
I played CoD 1 on PC that was about it. Just a worser CS from my perspective.
Which reminds me, I just saw that the new CS Global Offensive is a console game. Ugh. Come on Valve stop lowering your standards. I mean I'm not anti-console, but it's clear (as with L4D imo) that console games means dumbing down.