Serious game store competition has improved Steam a lot. Epic Games may be a shit company, but they keep Valve on their toes and we're all better for it. GOG is also ahead in many ways, like how their launcher integrates with every other launcher so you only really need to open GOG if you want to play games.

Shitty stores that only offer their maker's products (uPlay, Origin, Battle.net) don't need to compete, so their experience is usually crap. Most of those have vanished these days, though.

I personally hate the stores and the games that require you to "login" or even worse subscription based games.