No. There's certainly less overlap between Go players and 'mainstream' fans than one might expect, but I certainly don't get the impression that this is a fanbase that's angry, upset or divided over anything.
Guess it’s tough to tell sometimes. It seems like there is always huge complaints when a new Gen comes out.
Remember the beginning of Gen V? Well now Gen V is revered.. even myself who a few years back criticized Gen V has been charmed.
I don't really see a distinction between what you describe and merely 'people having opinions'. It's a fairly old series with a great many instalments and great scope for personalised gameplay experiences. People disagreeing on their favourite generation/Pokémon/characters etc. doesn't signify a deep-seated antagonism.
People love drama and social media gives everyone a platform to sound off, so I think we're living in a time where a lot of people are commenting about things that, in years gone by, they wouldn't have bothered and they'd have just moved past. Like people who we disappointed about the removal of wild battles would have been like "Aww man" when they found out and that would have been it. Nowadays that disappointment is perpetuated on a near daily basis across various internet platforms because that's just where people sent their time now.
You can't respond publicly to a TV ad about a game you're disappointed in, but you can respond to a tweet promoting that game. And the next one. And the next one. In the olden days you could send a letter that was critical of a game into the Official Nintendo Magazine and hoped they printed it but now you can make a YouTube video about it. And another. And another.
So I don't think this is a particularly divisive time I just think perspectives can be skewed by the magnification and perpetuation effects of the internet and how fandoms don't really have anything else to occupy themselves with in between instalments of their franchise besides complaining about what we do know. Or what we don't. I remember back when Sun and Moon were announced and there was a gap of a few months until the first real information and people would complain that we knew too little and it was killing the hype. A lot of that was because there was nothing else to say and for some reason saying nothing just isn't an option.