Topic on Talk:Crazy Taxi (Steam)
It could be that the Steam version of Crazy Taxi doesn't properly support DualShock 4; I haven't used DS4Windows in a long time, but without it the game doesn't want to work with it on its configuration tool, and even with Steam's Input wrapper, the game wouldn't play properly with a DualShock 4. I didn't think I had performance issues on the same PC that I'm using either on DualShock 4 with DXVK and either stock or controller fix executables.