Its pretty simple really, Valve just need to get over its god complex and abide by a countries laws. Lets be honest, the Policy in Australia mandates that it must be "fit for purpose" and it pretty fair with its judgement on such things. I know through personal experience that some games state controller support when they dont actually have it, ive got a couple of games which say co-op when its not actually true, I have a VR game which was VR then pulled VR support a month after I got it ( though it was a free to play game so cant complain there). The fact is they have to offer a fair refund policy and in Valves case this would be best to be decided on a case by case basis. All they have to do is state in its current refund policy that it doesn't revoke any users refund rights within their countries laws. Many refund and warranty statements say this and they are perfectly legal. Its not an issue of abuse, its an issue of doing the lawful thing when its the law