You didn't buy a game. You knowingly bought a prerelease game demo.
Anyone playing this now is getting a sneak peak into what a great game this will eventually become. Yes it has been a 3 year project so far and there has been several changes in developers working on it.
But the reason we all stick around and keep trying it is because we all know the potential this has.
That includes you with all your negative comments. You love it so much you can't leave it alone. Why else do you keep posting here ?