So windows 8?
If so that might explain why I haven't seen the steam glitches myself, I'm on Seven. However, Steam's business policies are stated up front, and they typically link to a forum typically seperate from the publisher and a metacritic score if anyone bothered to review it. If neither are there, typically there's a reason. They give plenty of chances to look something up before a purchase, and it's not like you can return hard copies of games once they've been opened anyway. I'm not going to say the policies are great, but generally speaking when something is utterly nonfunctional or packed full of blatant lies(Sots2, WarZ) they've at least offered a refund, if your pursue it hard enough.
For practical fixes you might want to check out paradox's forums, their fans are so used to bugs the tech support forums generally have running lists of dissagreeable hardware. It could well be you've got an oddball graphics card they never bother to test even if your drivers are up to date. Steam can't make paradox's business practices suck less short of no longer selling their games, which I might advocate for, but I doubt it'd actually happen.