Absolutely a massive bust. You don't look at the Leafs and J'Marcus Russells of the world and then shrug your shoulders and say "meh, Mitch aint that bad". Those guys are just worse, thats all. Doesn't make Mitch good. All of the bum QBs of Bears past didn't make Cutler or Mitch good or make them worth keeping.
You put all of your eggs into the Trubasket, and it's gotten you nowhere. It's not just taking him with the 2nd overall pick. Its actually using all of those picks to move up one spot for the player who was going to be there anyways.
Its not doing your due diligence with Watson. Its having Mahomes and Watson end up great. Its trading two picks for Mack because you blindly hoped Mitch would do his part in carrying the offense. Considering what you gave up for him, what he's given you and what you missed out on, Mitch is a 100% certified bust. Fart noises.