Funnily, my performance in trackmania is fine... But I have an entirely different issue - if at any point I open the Ubisoft overlay, from that point on, if I tab out of the game and back in, I'm unable to control the car until I open and close the overlay again. The UI accepts inputs normally, it's just the car that doesn't.

Previously I had an issue where the game would refuse to accept controllers being connected while the game was running - the button prompts would actually switch to controller style, but the game would refuse to accept controller inputs, and the controller wouldn't show up in settings.

But yeah, those are issues very specifically with that game, I don't even know how they managed that.