Lemmy faces the same expectations problems as every free/libre software
It's the same as with Linux, GIMP, LibreOffice or OnlyOffice. Some people are so used to their routines that they expect everything to work the same and get easily pissed when not.
Lemmy and jerboa are extremely polished compared to a lot of the free software I've used, albeit a lot less complex. FreeCAD is one that comes to mind whose UI and interaction actively fights you just to do simple things
I'm sure it has, but trying to use it still frustrating. For example, when creating constraints, if you don't explicitly select everything or nothing it pops up an error over what you're doing and plays an annoying sound. They at least improved it a bit since I last tried it and now you can select the tool and then the points and lines, but if you have anything selected at all but not everything (e.g. point onto object and you only have a point or the line) then it still throws the error instead of trying to interpret. Its extremely jarring when you're trying to do basic things and completely turns me off of using it. If it works with both all relevant objects selected, no objects selected, and can determine when an invalid number or types of objects are selected, then it stands to reason that it should be able to interpret what is missing and just let you select that, but instead it throws a tantrum.
Fusion 360 is so much easier to use but its a huge application, runs slow, and dies on complex parts. I also use it because it has more control schemes, which is what made it impossible for me to get used to Inventor. I find the elitism of expecting people to just memorize what order to click in to not have the application scream at you, or people saying to get a special mouse to use CAD or use the applications particular flavor of control scheme to be stupid.