No, the current state of the team comes down to not having any impact players come up from the minors in the last 3-4 years. Not one pitcher, and a bunch of maybes in Valencia, Revere, and Plouffe. Yes, the trades were awful, but the farm system has been pretty much useless. This is due to awful drafting and developing, not just bad trades.
Also, they signed Marquis and Capps, instead of using that money to sign a legit starting pitcher. Also, they didn't trade veterans last year when they had the chance. So far, it sounds like they are being unrealistic in their demands this year, we'll see in a few days.
But this is largely a problem with drafting (and the Garza trade, which is the worst of all of those trades).