The solution is very simple.
If you must be a Terrorist, sabotage your team's efforts to win. Sometimes when I have an idiot team member who is hiding in the shadows, I shine my flashlight on him so that the opponents know where he is.
Another good method is to throw a flashbang at your own team. Some idiots do this inadvertently. Also, if you have the bomb, go to a really remote area of the map and drop it there... Finally, relay all Terrorist-only messages to the Counter-Terrorists. Let the good guys know where the rush is going to happen.
Hope this help.