Joel voting for Tracy may have been strategy, and sure he can tell Mikey B straight up he didnt vote for Mary, but then the rest of the young alliance can jump on Joel for saying it was his idea to vote Mary, and he didn't. That makes him untrustworthy.
He targeted Mikey B for playing too early, and look at Joel. It's clear he wants to be in charge, but the ego? He hasn't proven anything to give him such an ego. He didn't do jack at the immunity challenge and here he is yelling at Kathy for not doing anything yet he ended up doing nothing either other than b!tching. "I tried to start a fire for 30 minutes!!!!" Great, but did he? Nope. Did he build a shelter? Nope. Joel is worthless.