Re: Brannon Braga found that taking the heat for Star Trek..
Brannon was one of TNG's better writers and had a hand in some of the better VOY installments. He penned what are arguably some of the biggest fan favorites-Cause and Effect, Parallels, All Good Things, Scorpion, Deadlock, Year of Hell, Power Play, Prey, Shuttlepod One, Distant Origin, Shockwave etc.
He was only really in charge in season five of VOY and alternated responsibilities in season six while developing ENT before handing the reins over to Biller in season seven. So he really wasn't in charge of VOY but a small portion of the time it was on the air.
He did energize VOY with Seven of Nine and the telefilms. So VOY's issues should be shared among Piller, Berman, Taylor, Biller, UPN etc.
You should also remember that Ron Moore, whom everyone loves to praise as a writing genuis, had a hand in the middling Generations. And the oft-bashed Nemesis was written by Logan and Berman. Braga had nothing to do with it.
The one show where criticism is fair game is ENT given his extensive involvement with that series. It was clear he was at times burnt out with a track record of being all over the place in terms of quality in writing. Season three improved probably because the arc played to his strengths in a lot of ways.