I use the Steam Controller still for games like Doom Eternal, Left 4 Dead 2, Spin Rhythm XD, The Finals, etc.
Basically any first or third person game that has aiming, but I am not sold on the Deck touchpads as primary inputs. Tried it and didn’t like it. Found them uncomfortable, size too small, and shape resulting in inconsistent swipes as someone who likes to target a consistent 180 on an edge to edge swipe.
So it will be a good controller for dual joystick users who occasionally want to use the touchpads, but not a good follow up to Steam Controller users who wanted a new controller to use the touchpads for a majority of their games.
It’s probably more due to not knowing how to use it and just going with whatever random config was applied. It’s not a controller for people who aren’t used to controller remappers and just wanted it to function like a xbox controller.