I agree, although you can argue he did progress the characters of Luke Cage, Spider Woman, and Jessica Jones by putting them front and center in his books, which were the major titles of the Marvel Universe under his guidance. If you had told me eight years ago the Avengers would become more important to the company than the X-Men, I would have thought you were crazy, but its Bendis who is mostly responsible for that (though Millar helped with his Ultimates run).