All of it. Fans deserve better than this. When one sub .500 team is beating another sub .500 team by nearly thirty points you know the latter team has major problems.
The players have turned on Larry Brown, but he isn't the major problem. Put another coach on this team with the same roster and they won't make the playoffs. Larry Brown doesn't necessarily help matters, but he's being used as a scapegoat. This team's major problem is a talent issue. Botched drafts, bad trades, and questionable signings tend to bog down a team. It's past the point of embarrassment.