Games keep crashing on starting screen

I have bought the game, at full price, a couple month ago. I wanted to use it in VR, but the performance seemed low, so i started using it on my monitor. For a couple of weeks, everything worked fine, i played it for a couple hours and was generally pleased. That said, it's now been a month where i can't even start the game: i press play on steam, the F125 first loading screen starts, it finishes loading, and then closes. Then, the actual game opens, it gets to the first loading stage (i can see the screen with F1 and F2 copyright) and then crashes. No info, nothing. Not even a crash report window. i've spent the last two days trying to make it work, following every single guide i could find. Updated the drivers, uninstalling and reinstalling the game, checking for file integrity, uninstalled Hardware settings, started it in different modes, rolling back nvdia drivers. I watched and followed a 1 hour long video with every single troubleshoot known. Nothing. I spent 70 euros on this, and i could only play it for 7 hours. It's unacceptable.