Short answer: no. He's had a hugely positive impact on film scoring as an art form, and (whether deliberately or not) has done more to stir the general public's interest in orchestral music (good orchestral music, in my opinion) than any living concert-hall composer would likely be able to. Personally, I never understood why hating on John Williams is such a popular pastime among B.M. Composition types... even when I was one of them!