If you want to type text into another window that isn’t focused, you need to switch focus before continuing to type so your text goes into the right window.
No you don’t, you just click the text box. Once. This works perfectly, and as expected, on Windows and Linux.
If you’re double clicking, it’s pretty much always because you actually want to double click on something specific in the UI.
Except it’s not. It’s because you’re trying to bypass the annoying ass “focus” feature.
Skill issue.
Okay so we’re moving onto personal insults now, I suppose.
I’m beginning to think you’ve never used any computer since you don’t even know what window focus is for.
Every other computer I’ve used works normally. Only Mac has this annoying ass “feature”.
Atomic distros were created to solve exactly that problem. I like Bazzite because it also has seamless background updates (among other reasons).
Any Debian fork will run .deb packages. But plain Debian is just very vanilla and will be missing a lot of stuff you’ll probably want.
These are all going to be features of the DE, and you can install any DE on any distro (AFAIK).