I’ve noticed a pattern. Everything is fine until I hit ESC and go into the menus. When I exit the menus, the mouse cursor not only won’t click on anything, it doesn’t even change its shape when I mouse over things that are supposed to be clickable.
That and I can can also confirm that it randomly stops like it hit a wall and I have to yank my head in that direction to get it past the sticking point.
I asked for a refund but Steam refused.