As people have said in some of the many, many other threads on this subject, if they really wanted to copy someone else's style of full-screen error message they'd have done much better to go with "Guru Meditation"
Many of those things you're thinking of were declared Somebody Else's Problem by said developers. That's fine, but Wayland was not ready for use by normal end users until somebody else did finish them.
From what I hear most of them actually are finished by now, but they weren't as of a couple years ago when it started becoming commonplace to see declarations that the time to switch to Wayland was Right Now. I tried it out then, and am as a result much less enthusiastic about doing it again now even though it'd be much more likely to go well.
So who exactly does own OpenSubtitles Group Limited, and what are their motivations? If you're claiming to know, I assume you must be some kind of insider? Because they don't seem to be all that open about it. Otherwise we can only judge by their actions.
I've had issues running stuff even on debian. Too often the people packaging things just assume you're using Windows to run your Windows executables like some kind of noob.