While a 3.0 does seem harsh, it does mean that there is very little going for the game. When a game gets a 5-7 you can argue it was undeserving. But when they give a game a 3.0 out of 10. I'm pretty sure that means its pretty crappy.
I'm not saying the game doesn't look like it has potential, perhaps they just didn't do a good job making it live up to that potential. No reason to get defensive until you actually play it though.