Capitalism and a free economy are good when it's serving customers by making the best product or service possible, while balancing that with paying labour to make that happen.
The problem is that nowadays, there's a third party to this for the megacorps: Shareholders, which is where the enshittification begins.
Valve is a private company, so it is not beholden to any external shareholders, which is why it's been able to chart its own course. Still, I do worry what will happen when Gabe steps down.