Interesting read, it’s a shame the ranty format makes it 3x longer than necessary. Not sure why it takes a dump on VLC - it’s been the most stable and friendly video player for Windows for a long time (it matters that ordinary users, like school teachers, can use it without special training. I don’t care how ideological you are about Linux or video players or whatever lol).
VLC works great on Linux too! It's one of the few programs where I expect the exact same look and feel regardless of the underlying OS. mpv is okay but its complete reliance on command line flags and manually written config files makes it a bore.
Slightly ironic, as I think a new UI is underway (and coming soon?). Not sure what version it's planned for, but I think some beta has it enabled by default already, was surprised when I saw it. So the consistent UI is here today, and will be in the future, but there will be a slice of time where different users will run different versions where some switched to the new UI, and some haven't. But it'll hopefully be a brief period, and of course it's still cross-platform :)