Like any opposition party, the anti big tech crowd is actually a loose coalition of different goals and interests. I've noticed that as these platforms get through the earlier stages of "will it even work" the differences in values are becoming more pronounced and controversial. The primary two groups seem to be those who value federation and see centralized control and algorithms as the threat and those who value encryption and see surveillance as the threat. Obviously these two things aren't mutually exclusive and we all want to see new platforms that can solve for both. But there's a quite distinct difference in the primary priority and consequent technical decisions.
I hope maybe if we can be aware that this is a broad set of technologies being driven by a broad set of goals then we can be a bit more gracious when a project isn't perfectly aligning with our personal values and find the common ground and values.
IMO the next important unblocker for Linux adoption is the Adobe suite. In a post-mobile world one can use a tablet or phone for almost any media consumption. But production is still in the realm of the desktop UX and photo/video/creative work is the most common form of output. An Adobe CC Linux option would enable that set of "power users". And regardless of their actual percentage of desktop users, just about ever YouTuber or streamer talking about technology is by definition a content creator so opening Linux up to them would have a big effect on adoption.
And yes I've tried most of the Linux alternatives, like GIMP, Inkscape, DaVinci, RawTherapee, etc. They're mostly /fine/ but it's one of the weaker software categories in FOSS-alternatives IMO. It also adds an unnecessary learning curve. Gamers would laugh if they were told that Linux gaming was great, they just have to learn and play an entirely different set of games.