Aw, that's a shame.
Do you happen to remember any links, or any quotes? I'm not doubting you, I'm just curious as to the substance of his complaints.
See, I've heard differently. Chris said that working on Doctor Who was an honor and that he had nothing bad to say about the program, just the BBC and their mucking up the PR about his departure. He also said that he was touched by the response from children when he played the Doctor, and that he'd treasure it for a long time.
I do get the sense that he and Russel T. Davies parted on less than amicable terms, which is a shame. As Chris said, the fact that Davies was working on the program was what got him interested.
And yeah, Chris has no right to talk that Doctor Who was beneath him, as he did went on the star in GI JOE.
Dragging up an old point, but I just found this:
BBC News - Christopher Eccleston talks about Doctor Who exit
"I was open-minded but I decided after my experience on the first series that I didn't want to do any more," he said.
"I didn't enjoy the environment and the culture that we, the cast and crew, had to work in.
"I thought if I stay in this job, I'm going to have to blind myself to certain things that I thought were wrong."