1 - An EA isn't even a beta. It's an alpha. By definition, not being feature-complete nor final.
2- The "two hours limit" on Steam is indicative and they can decide to ignore it on a case-by-case basis. Guess yours didn't qualify. I bet it may be related to the fact that you failed to mention how many hours already spent on the EA.
3- You didn't buy the game you got now. You bought the game that will release one year from now. Your preorder simply gives you "privileged access" to an in-development build. And you were warned ahead of your purchase
