Dude is so much of a screwup that it takes Darth F***ing Vader waving a finger in his face in order remember that he isn't supposed to disintegrate anyone on this mission. How many times and how badly did he have to mess it up in the past that it's come to this?
I mean, Zuckuss and 4-LOM don't gotta be asked twice--they know how to handle their business. Dengar knows where his towel is.
Boba Fett? He's a dirtbag loser.
And I love him so much because of it.