Ok, so now you're criticizing them for being too successful.

They don't own the OS, they don't (until very recently) own the hardware, they haven't really made any major uncompetitive or anti-consumer moves I'm aware of, and they provide a service that the majority of devs consider worth it.

I guess you could argue they're taking advantage of a bit of a "natural monopoly", but there's still plenty of room for other people to eat their lunch, and things like itch seem to have carved out a niche for devs that would rather keep their money than get the additional services Steam offers.

I don't think Steam is flawless, but for how powerful they are, they sure seem a lot less evil than almost every other large corporation.