Ok here we go. I do not work for Stardock. I do not represent Stardock nor am I affiliated with Stardock or any of its employees in anyway.
So I am free to say what I think about your dissatisfied purchase.
First off, the purchase is NOT thru Stardock its thru Steam, you need take this and your complaint and request for return to them. PERIOD END OF STORY. While Stardock has created the product, the transaction and any returns thereof are Steams liability not Stardock's.
Second, you played the game for 40 hours. Let me repeat that. You played the game for 40 hours. Hmm if you bought the game on steam sale you got it for about 25 bux, maybe 40. That is about 1 to 2 dollars of entertainment an hour. That is a hell of a value, I think you got your money's worth!!
Third, your return is based on the idea that the product is faulty and therefore you are entitled to a return. Ill go to my second point, you played for 40 hours! However, lets look at facts. I have played about 2000 hours and I am not experiencing any of the problems you claim, nor are any of the vast (10,000) players as this forum would be flooded with complaints and it is not.
I am doing my best not to attack you Andrew but customer service issues like this really irritate me. If I worked for Stardock and said half of what I did here I would be fired in a hot second, thankfully that is not going to be case.
I see you validated your files, did you submit a bug report?
Again this not a Stardock issue, its a steam issue. You purchased a product there, you need to take your request for return there.