His abandoning TOS in the 3rd season certainly had implications to the quality of the scripts and to the future departures of Justman and Fontana. His ethics were always in question by the higher-ups given his affinity for casting women he was sleeping with (Nichols, Barrett) which, among other things, did not help him politically where he needed some capital.
That's not really a fair assessment of "Trek's lowest moment," IMHO. During its original run Star Trek was not that popular, and Roddenberry's actions wouldn't have changed the fact that the show was still going to get cancelled after the third season anyway. You can't fault him for not knowing at the time that his creation would turn into the phenomenon that it did.
While I agree that Roddenberry's antics during the start of TNG would probably have caused that show to get cancelled had it been on a regular network instead of being syndicated, this also isn't quite a "low" moment for Trek. In fact, I'd argue that Star Trek was at it's most popular moment ever during the entire run of TNG, Roddenberry or not.It also caused / allowed most of what sucked in the first two seasons of TNG. It alienated good people like Fontana and David Gerrold.
But again, this wasn't a "low" moment for Trek, as the next three films were hugely successful despite whatever Roddenberry felt about them.His behavior as Producer / Writer on Star Trek- The Motion Picture almost ended the franchise and alienated several key players, including Nimoy. It also resulted in his permanent exile from the movie franchise.
And as I said before, I think you're confusing your personal feelings toward Roddenberry with some type of irreparable damage that you seem to think he caused Star Trek in general. Yes, he was a deeply flawed man and yes, he probably should not have been put in charge of TNG at the start. But I'd blame UPN, Berman, and Braga for Star Trek's lowest moments far more than I'd ever blame Roddenberry.Don't get me wrong. I'm eternally grateful for the gift he has given us all, God rest his soul...but that's why the truth about the man he was is, indeed, a low-point.
I stand by what I wrote.T'Pol's buttcrack, indeed.