This discussion is really interesting and some veins in it are awfully strange. As someone else point out, if he "got screwed" that means that he was bumped back for reasons other than that he wasn't the best. That would mean that Bo Pelini and or Shawn Watson, adult men who get paid a lot to head a football team consisting of adolescents and young men, burdened with strong demands of success, would risk their season just to stick it to a college student for completely unclear reasons (e.g. Bo doesn't like him)? Does anyone else feel that that line of reasoning and set of assumptions are totally absurd and bordering on insane? The best explanation in here for how he may or may not have gotten screwed is that he didn't get snaps in his underclassman days and didn't get a chance to learn the complex system. But the idea that Bo would hate him and tell Watson to bump him to third string is just crazy when you consider how much of Pelini's and Watson's future ride on the success of the team.
The same thing goes for the other side of the same coin, though, that Lee is somehow owed something by the coaching staff and should get played regardless simply because of his seniority. I don't doubt that it would absolutely suck to be passed over by younger players, but just as I find it difficult to believe that the coaches would be petty and punish the team and themselves because a player is, what, arrogant? Unlikable? I don't know... just as I don't believe that, I also would be extremely disappointed if they played someone who was less qualified just because the staff like a guy. They get paid to be and act like professionals and not run some kind of Feelgoodery. They should work their butts off to refine every ounce of potential into practiced talent, and if they fail to do that, then, yes, they are "screwing" their players. But if they do their jobs, the players show up and do theirs, and some players, through a combination of practice, natural talent, and other characteristics are better, then it's up to them to fairly evaluate the players and put them where they belong.
This current staff hasn't given me much/any reason to believe that they would play a subjective game of favorites/least favorites just to fulfill some petty impulses. That being said, I don't think that they're robots and that they do have emotions that might lead to poor judgment from time to time, but bumping someone from first to (what appears to be) third string? That doesn't seem like a decision that would be made by a single person or made lightly.
So, in short (maybe I could put a *skip to summary* link at the top

) at this point, I believe that they made their decision based on many observations, notes, videos, hours of practice, and long discussions among the staff and not the process of some kind of evil, mustache-twirling, cat-stroking, Champagne-drinking sports movie villain who just has it out for the good-hearted kid.