It's not amazing with a controller, but it's serviceable.

I've been running the game on a Steamdeck, nearing what I think is the end of act 2.

Looting is made much easier by holding "A" and iterating through whatever is in the environment. Unopened items like chests and bodies have an asterisk* to indicate as such. The action wheel isn't wobbly as far as I can tell, but the lack of snapping is an accurate critique. Small item icons are probably just how it has to be unless you fancy navigating between several pages/tabs/scroll screens full of items.