I would not go on a trading spree because the majority of your players are sell low candidates. For you to compete, you would need Kemp, Lawrie, Dickey, and Lincecum to get it together. That could certainly happen, but if you were to trade them, you would not get good value at all.
If you are frustrated badly, I would say sell Cargo, and try to get a stud 1b and upgrade second. Also, for a root, your team looks slow, maybe get some wheels in the FA.