[2020] [Steam] I can't launch the game...

I'm on Steam, and I can't launch the game, pretty much the title. Whenever i click play, the usual steam window pops up saying "Preparing to launch Rocket League...", and it dissapears as usual indicating the game is about to start up. But nothing happens after that. About 6 seconds later, the blue [X - Stop] Button turns back to the normal green [> - Play] button (all in steam). What do I do guys?

EDIT: Here's a video of what happens when i click play: https://imgur.com/a/R6SbA12

EDIT 2: Completely uninstalling and reinstalling Rocket League, let's see how it goes :)

EDIT 3: Reinstalling Rocket League from scratch did NOT work. :D

EDIT 4: Things tried: -Restarting Steam -Restarting Computer -Reinstalling Rocket League -Updating GPU-drivers -Setting all kind of dx launchoptions(-dx9,-dx10,-dx11,-dx12) -Launching game from player-invite -Going to steamfolder and going through every setup(Redist,DirectX,PhysX,DotNet)