> Even selecting things in the UI has sucked. I went in and increased the selection radius or whatever, that helped. But really, should I need to do this as a new user?

Agree - selection isn’t broken, but it’s definitely sometimes frustrating and as it’s such a common function, absolutely should be as close to perfect as possible. I think it’s partly that the visual indication of what you’re hovering over and would be selected is too subtle, and also I’ve found (on Mac; I’ve not confirmed on other OSs) that it’s not selecting what’s at the exact tip of the pointer, but is rather selecting a couple of pixels away.

> Getting the constraints to behave is like pulling teeth.

Huh, once I’ve actually selected correctly, I find the constraints are fine - say, 95% as good as Solidworks.

> It also kind of sucks that you have to have really sparse sketches that only contain one closed figure.

Can you explain what you mean by this? Do you mean you can’t have a sketch with (to take a very simple example) a circle inside a circle, or two unrelated circles, or something else?