The tools consistently make sense and are where I expect them to be, and I find the menu bar to be well set up. Dividing the different functions into Image / Layer / Colors / Filters makes a lot of sense to me. (I do use the system GTK theme with color icons, which I don't think is the default, but it makes the tools much easier to see for me.)
I'm not doubting that some people have trouble using GIMP but I have no idea what those problems are, because most people aren't specific about what parts of the UI confuse them. I've yet to see a graphics editing program that was at least as powerful as GIMP and less confusing.
In MS Paint, it's like 30 seconds of work: Crtl+A, Crtl+C from one image, make sure that it's a transparent copy, Crtl+V in the other image, wangle-jangle the box to be correctly positioned, save it, done.
In gimp? Good God, it's at least 10 trips to google to figure that out.
I don't see how it could possibly be simpler than that. Even the exact same keyboard shortcuts you used in MS Paint work directly in Gimp with no changes!
I'm going to be honest, I'm not a daily gimp user. Even the terms you've used here (flatten, anchor, export, tabbing over, temporary, move tool, permanent) will require me to google those terms.
I'm sure that the shortcuts that I've used 'work' for you. However they do not 'work' for me. Like, I'm honestly going out of my way here to test this out and trying to follow what you've written there. I'm spending my own time to try this. I know what AWS is, I know Python and pandas fairly well, I've gone to talks by Stallman, etc. I'm not grandma.
And I have no idea what to do here or what you're trying to tell me.
Gimp, for me, a semi-tech-literate person, is gobbly-gook and requires loads of training to get up to speed.
I'm also not sure what you're talking about with right-clicking, since the instructions I gave don't require you to click on the image at all.
If ctrl-c on one image, ctrl-v on another doesn't put the first image on top of the second for you, it would probably be helpful to report a bug to the Gimp folks because that's always worked for me and surely ought to work. (Obviously if you're on MacOS or something the key might be different, cmd-c or something.)
How hard it is... You tell me :)
Just trying to find the Edit-Paste drop-down is difficult. I need google because I need to find these functions in the GUI. It's not 'clean' or easy to find things like this in the hundreds of options.
I did not know that gimp has a search engine, I will try that the next time I need to fight with gimp. Also, "/" is a non intuitive way to bring up the search functionality. There should be a drop-down menu or something somewhere. Just trying to figure out that "/" is the only way to search is not a good method for getting into the search menus.
Help > Search and Run a Command /
/ is also a common shortcut to invoke a quick find text entry, for example in web browsers.