Very problematic game i need a refund.

Hello. I bought this game from you a couple of days one month and some days or something and from the first day I had problems with the game like CTD and bad gameplay like AI and you can't play a career my player gets injured all the time!! They patched the game but they do not fix the problems and its getting so long, the game is unplayable for me and a lot of people! I validated the code/game in steam. So you guys can refund this game or Steam must refund the game how it works!?