Gnome has always been like this. They started on this trend at the very beginning.
I dropped it when they released 1.0 or 1.1 as they had released another of idiotic changes that were half because "we know better" and because "fuck you, user peons". Never looked back as it's been managed the same way ever since.
Tumbleweed absolutely is an all purpose distribution. Most distributions are. Very few are specialised enough to make a difference.
And they really mostly all install the same thing in the end. It doesn't matter which one you choose. Just pick something that's not obscure and that has a release cycle that works for you.
For kde, I'd say that the best maintained ones are suse, fedora and kubuntu, in that order (although with the latter you still get Ubuntu, so ymmv).
In the yellow countries, it's likely the concentration of titles in too few hands as a lot of media end up being bought up by the same few groups to output the same stories.
You're in luck, there's a whole movie devoted to this very topic.
Although, basically, it's nothing very special. Uh, try and be nice to people, avoid eating fat, read a good book every now and then, get some walking in, and try and live together in peace and harmony with people of all creeds and nations.
But mostly it was also because of the omnipresence of the dollar on the international stage which gave them huge leverage.
The US never treated anybody well, they were absolutely ruthless and would screw anybody whenever possible. This was known and pretty much expected. But at least they would mostly stick to their word, like most other civilised countries did. Now, nobody knows what to expect, whatever their government says, which creates a fair bit of tension.
On the space cadet keyboard, it was apparently considered valid form to complete complex key chords with your nose.