Yeah, it happens. And I get it. Grudges, biases, projection, and other strong emotions are what separate us from the machines we are typing on right now. We're only human.
I notice that many of the people who might not care for Critical Role are fans of other streams. Like [MENTION=518]JeffB[/MENTION]: he prefers different, more "indie" broadcasts, which might create bias against more "mainstream" content. And personally, it's frustrating to me that Relics & Rarities is nowhere near as popular as Critical Role, and probably never will be. But it's not a popularity contest; it's possible to enjoy more than one streaming show. I know this, but it's still a thing that happens.
And game edition bias is a real thing. Not everyone plays Dungeons & Dragons...and of those who do, not everyone uses the 5th Edition rules. A lot of non-5E players might already feel ignored, and this isn't helping. It can feel like: if Critical Role is popular, and Critical Role runs 5E, then 5E might also get more popular, then other editions might be ignored. It's not accurate, it's not logical, it's not even scientific...but it affects people's opinions all the same.
Also, a good number of Critical Role fans are new to D&D, and might not be aware of the long history of the game and its evolving rules. A Critter might say something like "but that's not D&D", meaning that it isn't covered by the rules as they understand them--and accidentally trigger a heated debate. Hearing "but that's not how Matt does it" once or twice is frustrating as a DM; hearing it every. single. game. can really grate on the nerves and cause you to automatically view anything related to Critical Role in an unfavorable light.
Anywaaaay, I get it. Critical Role isn't for everyone, and not everyone needs to watch an episode of the show to come to that conclusion. I mean, informed opinions are nice to have, but that's not how Matt does it...
*gunshots, explosions*