LOL. Except the Holiday Special was gutted and stuffed and bore little to no resemblance to what he really wanted, and Howard The Duck wasn't a movie he had any creative control over, he paid for it as a favor to Willard Huyck and Gloria Katz for their work on both Star Wars and Indiana Jones. He made no creative suggestions, he put his name on it to try and get it more money for his partners. That's about it.

But good try with the Howard the Duck thing. You'd probably be better off blaming him for Return to Oz, since he had to take over producing and some directorial duties for his friend Gary Kurtz after Kurtz left the production and Murch fell ill. At least with Return to Oz he actually dabbled in on-set duties.