The only thing I can really think of is that the blown 3-1 leads really weighed on Mitchell and just made being on the Jazz miserable.
I still dont see how he can be having the most fun of his career when the Jazz were far and away the best regular season team before the Clippers series happened. You'd think that would be the most fun time of his career, or when he was the surprise rookie of the season and being a leading scorer on a playoff team that won a playoff series in his rookie season. Maybe it's all just about him having his best regular season stats of his career.
Whatever though, I just feel super vindicated for all the **** I talked about Mitchell before it was cool to do so. I really hope the Cavs underwhelm in the playoffs.