I can't comprehend how in the world you can be so indifferent about it and accuse OP of, citing, "not having any real complaints"
What's a real complaint for you then? OP has a good point in what he wrote. I'm 90s kid myself and while i'm ok with mobile devices, interfaces and such coexisting peacefully with desktop computers, i can't stand forcefully mixing those two completely different approaches to computing and UX in a way OP described, when there's no real justification behind it. Just try to think about it for a minute and comprehend it (Although i don't recall seeing any site that had ever thrown a mobile UI at my face while browsing from a browser which identified itself as desktop one, but that might just be cause i don't use the same sites as OP)>>36167
OP's point is, among others, that finding alternatives will keep getting harder and harder, if the trend isn't going to change.
As for the whole report OP linked, those concerns about decline in desktop computing in favor to android are still a bit exaggerated - Windows alone doesn't cover the whole desktop computers share, Linux and MacOS must be counted to (and maybe the tiny share of other niche hobbyist OSes, but that's just being pendantic, not to say autistic). Plus, people tend to have more than one mobile phone, or at least one for each housemate, which isn't typically the case with full-sized computers, even notebooks.
Pic related to my emotions while seeing this thread