First off This game does use more gpu usage than my past games but it runs at full speed on many older cards I got off of ebay under 50 dollars so I have to think that you are using intergrated graphics or a gpu that is absolute garbage. Your hardware has to be pretty bad for this not to run well or there is a bug with older hardware. Either way you are not the target audience since if you were not able to afford any good parts you will not be able to afford any games other than the pirate bay.
Secondly the music tracks are 20-30 second loops. You would know this if you played for more than 10 seconds.
Thirdly you didn't mention the gameplay (but I assume this was because of the fps on your garbage pc)