Hey there,
I’m sorry you’ve been dealing with this after already trying quite a few troubleshooting steps. Since you’ve repaired and reinstalled the EA app and also verified the game files through Steam, there are a couple of other things we can try to help narrow this down.
First, please try clearing the EA app cache. Since the app isn’t staying open, you can do this from Windows by opening the Start menu > All Apps > EA > App Recovery > Clear Cache. Once that’s done, restart your PC and try opening the EA app again.
It would also be helpful if you could attach a DxDiag, along with a screenshot of the cloud sync error you receive when trying to launch College Football 27. Those may give us a better idea of what’s happening and where the problem is occurring.
Thanks for sticking with the troubleshooting so far. I know it’s frustrating when you just want to get into the game, and we’ll do our best to point you in the right direction with the information you provide.