Homeland Season 2 Spoilers!!!
Everything that happened after Nazir arrived in the US pretty much. Not to mention the side plot of Dana and the VPs son killing a woman. There was also a lot of small things, like Carrie falling over when chasing Nazir or Carrie and the one agent getting seperated from the group when they discover Nazir. Or Brody managing to be alone forever in the VPs office in order to get the pacemaker number. The complete lack of development for Roya.
A lot of small contrivances, coupled with some hard to swallow twists basically.
I like Damien Lewis but I would like to see the show shift focus from Brody. Never going to happen though.
Some other things:
Nazir capturing Carrie in broad daylight in a car crash with no witnesses.
Nazir turning into some ninja to evade these specially trained SWAT officers numerous times in an abandon building.
Brody sending that text message from I assume a secure room in Washington D.C. to save Nazir in Beirut.
The CIA not following Brody when he went to meet the VP especially when they know he had planned to kill him.