There's also GOG, if you want drm-free downloads of games you purchase.
They have no standards/barriers to entry, so the store is being filled with crapware - developers releasing 20 games in a week, etc.
Plus, it has completely ineffective DRM, so the work of developers is not protected from piracy.
All of these things can be done better, and developers given a much better deal, which will result in better games being delivered to gamers.
People seem to care so much about Telltale shutting down and the poor treatment of game workers in the industry. Part of that is because the monopoly platforms holders Sony, Microsoft, Nintendo, Google, Apple, Valve have no competition in terms of the deals they offer developers. We need Epic to come in and break this pattern open with a much lower commission.
Apple charges 30% and afaik, so does Android for popular apps.
Also they give no-questions-asked refunds on purchases.
Which other store can match these features?
I really don't have any problems with Steam as a platform. I certainly like not having to have multiple launchers for the games I play.