I taught myself photoshop, GIMP, autocad, solidworks, and Altium, all to reasonable proficiency. Personally couldn’t figure the first thing out with Inkscape.
Another comment nailed it, they made literally alien UI choices.
As someone prone to the same failings I don't think they made alien UI choices, I think they made programmer UI choices where the programmers were struggling to make a reasonable UI choice, like the programmer's initial idea is to just make a text box and write a value but then they realize that is bad so they need to make some sort of interface to do it and they don't really have any taste about how any of the stuff should be laid out but they have looked at other graphical editors of course so they have sort of an idea of what is wanted.
It does not feel designed, it feels laid out by a programmer mimicking some other graphical editor from memory on an ad hoc basis.
Another comment nailed it, they made literally alien UI choices.