He hasn't been slammed since he joined the Heat.
Don't know if you remember but after the Heat were "crying" in the locker room following their 5th straight loss Bosh went public about demanding the ball. Since then the Heat have gone 22-5 (including the playoffs) and Bosh has posted 14 double-doubles and scored at least 18 points in 17 games of the 27 games. This has largely been due to him getting the ball on the block and in the post, and demanding it more. Over the course of those 27 games he's played tough, and let's also remember he's playing third fiddle so scoring a clip under 20 points per game is pretty solid. But yes he had a shocker last game, but that isn't a reflection of his recent play.
.
What about the other 50 games he played? I never really followed his play this year(being that James is the only player worth watching on the Heat).