I'm on Debian bookworm, and a screenshot is one Meta-Shift-S -- I just highlight the region I want to capture, and I get a dialog prompting me to (with one click) copy to clipboard, save to file, or annotate. There's a handful of out-of-the-way options as well, depending on what exactly you want to do. What's --- so abominable about that?
Why does it need a dialog? Just save the file AND copy it to clipboard. If user wants to annotate they can paste or go get the file.
you can assign a shortcut to do just that?
OK, do me a favor and switch over to Gnome and try there. You'll see what I am talking about.