Sims is very talented. Big, strong, fast and a good arm. But is just not anywhere close to being able to process the field to play QB at the P5 level. And then of course the incredibly high turnover rate - even if he was processing the field better and accurate with his arm, making the right reads, etc, - if a QB is turning it over at such a high rate, you just can't play them.
But my favorite thing about the guy - you can tell he is a truly good person and teammate. He could have been sulking and be toxic on the sideline once he lost his job, but instead he was the exact opposite - supporting and happy for HH or anyone when they played well. I can never hate on the kid for his horrible play, as he is such a high character guy who you could tell truly put the team first.