That said, Ellison is far, far from the only writer who had major disputes with Gene Roddenberry regarding Star Trek material. David Gerrold to name just one.
GR had some interesting comments about relationships with writers in "The Making of Star Trek". One of the things GR found out was that in some cases the prominent sci-fi writers they commissioned were good at telling stories, but not so good at writing TV scripts.
Without naming names he mentioned that his insistence on rewriting scripts cost him some friendships but it had to be done maintain the consistency of his vision. The book is GR's version and it white washes a lot of things and sidesteps a lot of issues, but it does have the value of being written before everyone (including GR) got the urge to settle old scores and tell their own stories.