The problem with the Wolves defensively is that they have no even above average defenders on the team at all. KAT actually has the 2nd best DRTG on the Wolves (he also has a positive DBPM and other advanced metrics are ok). I think he'd be fine defensively if he was on a competent defensive team with solid defenders around him.
The winning argument is pretty poor for someone that has generally had poor teammates, poor coaching, and awful management. Even the year they made the playoffs, KAT was still alright in the playoffs. In fact, Butler performed worse than KAT did in relation to regular vs. post-season performance. Was Butler not a winner?