It only costs $100 to list your own game on Steam, and that money is refunded if you make $1000. That’s all there is. The rest is up to the dev or the publisher. That barrier to entry is absurdly low. If a game isn’t making sales, it’s not Steams fault, it’s advertising. ANYONE can list games, which means there is a lot of chaff on the market. What do you want them to do? Increase the listing price so that trash games don’t get listed as often? Then you cut out the good indie dev, too. Game dev is only half the battle. You still have to reach your market once you post your game.

Steam allows you to buy from whomever. Want to support an indie dev on their first title? Go for it. Steam won’t stop you. You can be the change you want to see in the world.