It's really interesting that he says he didn't have a contract because in several other interviews he's said that he had a six month contract.
But be that as it may, it's been no secret that he hated his time on the show. He considered working on DS as a huge comedown from working on TV in primetime. (But then back then many in the industry considered working on a soap as scraping the bottom of the barrel.
) And the main reason he agreed to do DS was in the hope of reviving his career, which had been lagging since the cancellation of his primetime series
Checkmate.
And as for his comments about DC, well, it's also been no secret that he didn't get along with DC.