GabeN called piracy a service problem. And he's right. I've received games free on other platforms like Epic or EA and I've bought them from Steam just so I don't have to use the terrible apps. If I was younger or couldn't afford it, maybe I'd be sailing the seas. I bought Alan Wake 2 on Epic since it's a timed exclusive. I plan on buying it again once it releases on Steam because Epic is just so terrible. All the effort went into the store and almost none into the actual act of playing the game which is where I'm spending the majority of my time while I'm in the app!
Most companies don't care about customer satisfaction or post sales support. They have your money, why would they. Oh, yeah, repeat customers.
EDIT: Just to add a gripe about Amazon. Their games app is so bad that if you use the back button on your mouse while a screenshot is open the page changes but the image stays until you close it. If you click on a game to view the details in a long list of games and then go back it loses your sort order and position in the games listing. It's frustrating to use even just to find something to play. Steam has its own rough edges, but they're not in the golden path of discover -> buy -> install -> play -> share