Kicad should be great, but they’ve made a number of insane UX decisions that make it really unusable in practice. Horizon is actually based on the pretty good Kicad engine but it fixes most of the UX mess.

Do you have an example? I use KiCAD pretty regularly, and while they do have some odd defaults for a lot of their tools and keybindings, I rarely run into one that can't be changed/fixed in the settings.