I won't comment on his painting (haters gotta hate includes me) but I will say that he got everything from this guy.

I taught painting for over 35 years. The fact that Bob Ross made people get out there and paint is a major point in his favor. The fact that he favored tricks over actual observation is a shame. He taught thousands of people to swivel a brush, drag a knife, put a dab her and there and Voila!, you have something that looks like something. My painting may not be any better than his, but in teaching the craft, I think the point is to get people to look more carefully at the world around them, not try to learn tricks that will make their canvases all look alike.

Just sayin'