I never hear Gnome users crying about Valve heavily supporting KDE, so why are you angry about this?
This does not happen because Gnome is the most supported desktop environment out there, they have Red Hat, Google, Canonical, OpenSuse even Microsoft donated to Gnome. Don’t get me wrong some of this company do support kde too, but Gnome get treated in a different way because it’s the default de for most of the distros out there.
I don’t agree with you on this, people are used to install app on other operating systems this way, there is a better way yes I’m not arguing this, but a lot of proprietary software is distributed this way and not on the snap store, and being ubuntu a noob friendly distro make it worse for the averange user to search the internet only to install deb packages instead of providing a user friendly interface!
Yes I’m contributor too, not on distros tho, even tho I have tried to contribute to mint some time ago, never had a bad experience with contributions and trust I have made many many mistakes while trying to contribute, maybe it’s better if you don’t find the environment to be good for you to just contribute to something else that at least isn’t uncomfortable and isn’t discouraging, yes I know the problem shouldn’t have existed to begin with but we can’t do much about it if they don’t even acknowledge the problem.
And you forgot to say that their linux handheld is made with gaming in mind