As a seller I love Steam refunds. I love the idea that people would debate less about trying a $5 game. Just pick it up, play it, and return it if you don't feel like it's worth your $5. I don't want to take money from people who didn't enjoy the game.
I never want a bad review. If that rating drops to "mixed" you'd might as well be dead on Steam. I welcome negative feedback (even if harsh) through any other channel. Even if it's a "reason for refund" note.
That's all just IMHO of course! 😅