You know the haters were scrambling around chomping at the bit trying to find a way to pin 100% of the blame on Caleb if the Bears had lost 42-41.
I can't speak for other "haters" but I don't think anyone (or many) deny that Caleb is a good player, and that he makes a lot of good plays. The issue is that there are some glaring issues and problems with his game that prevent him, at least at this point, from being a legitimate franchise QB. While he makes a lot of great plays, he also makes a lot of bad to subpar plays that someone like him should not make.
One simple example: in the play that got Kmet hurt, on what should've been very simple and easy play (not much pressure on Caleb, Kmet pretty open), he threw the ball too high and behind, making Kmet stretch for it exposing himself, and ultimately getting injured.
He dances too much in the pocket, fails to go through his progressions (at least not fast enough), keeps looking for the home run play on every down and forging easy checkdown options, a couple of times he was running he went down short of the first down marker for no reason (defenders still 3-4 yds away), etc.
Basically, as stated before, he is not very accurate and his decision making is lacking. But he is so talented, athletic, and has such strong arm (specially on the run) that he makes plays to make up for some of his deficiencies. But those deficiencies are significant.