I don’t know whether you have the same issue but I got stuck on the EULA page because there’s a birth date selector behind it and they made both modal. The date picker is active but the EULA is on top so you can’t do anything. Tried in both Firefox & Chrome.
The solution for me was to just go back to the store page while signed in, choose a conforming birthdate and then the EULA page worked normally.
Checkout page is just badly written
I played through it at launch on my lower end gaming laptop (1050 GPU) that I had at the time. With some fiddling, and basically turning everything to lowest I got it to just about playable framerates.
Massively enjoyed the game and its universe. I hit a few bugs but nothing that was hugely game breaking, at least nowhere as bad as people were saying. I also managed my expectations knowing my hardware at the time was low-end/dated.
Then I saw footage of the game being played on base tier PS4 and Xbox One hardware and holy shit, if I’d bought it on either of those (especially Xbox), I’d have been furious. The game was not ready and should never have been released for those consoles. It clearly needed at least PS4 Pro or One X to even be remotely playable at launch.
The problem with that approach is that the authentic disc is effectively used as your licence at the moment. There wouldn’t be any effective way to stop piracy with offline zip files