Writing on Twitter at the time of the show's broadcast, the former Culture Club singer said that the docudrama, which centred around his early career, was "badly written".
"It's on in the background, the make-up is the best thing about it," he said, before adding: "Verdict, beautifully shot & styled but badly written, it lacks heart and soul!"
The star, real name George O'Dowd, did insist that he is "glad" the programme was made, although the pop icon later added that "all of it" was penned "with poetic licence".
However, critics were generally positive about the show, with The Daily Telegraph branding it "a stunning, sensitive and surprisingly moving production".
DS users also praised Mathew Horne's "outstanding" portrayal of drummer Jon Moss.