Truth is all fanbases have toxicity, but with Xbox one thing I think we can agree on is, they have professionals who mingle with, at best, instigators of console warring online.
Colteastwood spends 90% of his time on Twitter doing promo work for Xbox that'd make Klobrille blush, and trolling PlayStation. He's also one of the biggest names in the Xbox fandom as far as content creators go, he's even been invited to the Redmond campus a few times. DealerGaming has played games with Phil Spencer & Aaron Greenberg multiple times, even got Aaron Greenberg on their podcast a few times. On those same podcasts, they're usually shitting on PlayStation.
Most of the pro-Xbox content creators I can think of, including Destin, Boomstick, Zalker etc. ALL spend more than a fair amount of time trolling and crapping on PlayStation and enabling their fanbases to do the same. You have Xbox-adjacent creators (who are mainly PC guys) who do the same thing, and enable their fans to therefore do similar. Then you have stuff like Aaron Greenberg quote-tweeting VGChartz sales figures, when they have a dubious history at best, thus screwing up accurate sales discussions online.
I'm not saying there aren't fanboy PlayStation content creators, but you don't see Herman Hulst or Jim Ryan hanging out with them online or associating with them, either. They'd rather keep it professional. There also hasn't been anything with PS similar to things like the Xbox Ambassador fiasco, with people who don't even like the brand coming out to shield Xbox executives from constructive criticism, mainly because they were getting free stuff as an Ambassador. You don't see that happening with Sony or Nintendo, just Microsoft/Xbox. Meanwhile some of those same Ambassadors would be the first ones to spread negativity around PlayStation, even FUD. They may not be an Ambassador but the recent D3coder thing over the PS5 liquid metal "problem" popping up right after the 30 million sold-through announcement is just more of the type of thing that could probably be attributed at least partially to the sort of things Xbox people have encouraged over the years.