I guess it depends on how you look at it, and what Adrian Gonzalez was worth to real life teams.
For example, if you look at it from the Rangers' perspective. They have been trying to trade Adrian for a while now, with no great deals being offered for over a year. He fits absolutely nowhere in Texas, he would be stuck in AAA or as a bench player. He, in all honesty, is not worth much to Texas. So in a sense, the deal was Young for Eaton (wash, IMO) and Otsuka (great value). Young is a decent pitcher, nothing spectacular but the move to SD will surely help. Eaton has more raw talent and if he can ever put it together will surely be a better pitcher than Young. However, who knows if that will happen. With a gun to my head I would take Young, but Eaton is still intriguing. But, if you throw in Otsuka there is no doubt I would take the Eaton/Otsuka combo over Young.
Sledge is a toss-in, there was no room for him in Texas anyway. I'm glad they chose to keep Wilkerson over him.
But, if you look at it from the perspective that Adrian could have gotten a good SP for him alone if given time, then obviously you do not like this deal. However, given the ridiculous contracts being given out to crappy and mediocre starters like Benson, Washburn, Burnett, etc, then I don't think a light-hitting/contact first baseman would have pulled a legit ML starter in return. I could be wrong, but I just don't think he was very valuable in terms of pitchers.