I never really felt the need to refund anything.
I think the closest thing to regret after a buy was the Fear2 DLC.
But I am also not the fomo beta-test-pilot full price buyer anyway. So returning digital bargain bin stuff, would be somewhat moronic for those 5, 10 or even 20 bucks.
Might be law that returns must be possible, even though every purchase says something about with this click I accept the sale as finalized once I download (not even play) the game. But if it should be possible by law I wonder how Sony circumvented that so far. I guess licensed access and ownership are just not really clearly worded in those laws... and as long as lawmakers are asleep at the wheel Sony won't budge. Having an easy refund policy with some flexible rules depending on the games, more flexible than the hour cutoff steam has, I would agree with that, it would totally be the customer is always right approach, but if Sony does not like their customers to take a chance on games, throttle the game sales in that way and it bothers anyone than they shouldn't buy any risky games there. Sony seems not to care to lose these uncertain sells and attract customers willing to experiment.
Most people should know the differences and disadvantages of platforms by now. Only if someone just got a PS, only because everyone else has one and did not know what it entails, they should just refund the fucking console as a whole if it really is a deciding factor since as I said Sony seems not inclined to bother and change it. Shown with the massive wtf action they did with Cyberpunk.