Oh, I've seen it. Gene's Vision™ is a BBS meme for a reason. "Upset," of course, may not be literal, because who knows how posters really feel. But figuratively upset, posting pushback against an idea because it goes against G'sV™, absolutely. It does happen.
Agreed that there's general agreement that his creative instincts sometimes missed the mark. Sometimes yes, but whether it's often or quite often, probably mileage varies. I think there's also agreement, if not general agreement then certainly some agreement, that his rewrites on TOS produced good results, generally improving the material, and were largely responsible for the consistent overall tone and feel of the series, which was greatly to its benefit. There's a very wide chasm between giving credit where credit is due and veneration (not that you're saying otherwise), and of course Roddenberry was not the sole important creative force present.
How so?