Quoted from fosaisu:
I wasn't following closely, but wasn't he mediocre the last year or two in SF? Or did you put that down to mismanagement and a bad o-line?
His last 2 years were terrible, but his first 2 years were on a whole different level, Superbowl in 2012, NFC in 2013. 2012 SuperBowl is still an incredible time, Kap took over as QB mid season, and delivered all the way.
I believe his last year with Harbaugh was plagued by his sudden super star status, and how he completely lost any kind of humility, then a casting mistake with Tomsula the next head coach who was a complete failure. At that point the 49ers management was most likely upset and done with him, Kap put the last nail on his coffin with the kneeling thing.
But still, when you look at the many QB failures this season shows, I do believe Kap could deliver for many teams.