There is not a reason to veto a trade unless obvious collusion exists.
I second this! Collusion (cheating) is the only means for vetoeing a trade.
Even if a trade is lopsided, it shouldn't be vetoed unless 2 owners are colluding to cheat. Westbrook for Edge and Calvin is far from lopsided and shows no signs of collusion.
You should get out of that league. If 5 trades have already been vetoed, that is ridiculous. Sounds like your commissioner is a dictator or the league is set up for trades to be voted by the league which is dumb. Why be in a league if you can't even manage your own team? Sounds like a crappy league....
Send your leaguemates to this post and let them see how crappy the league you play in really is.