I'm wagering that Epic Games considers those things to be the things that Valve actually does right.
Which is their whole problem, they value the shittiest facet of Valve and think the 'good stuff' is where they screw up, and bemoan that Epic can't get the worst stuff going because Valve is an option in the market.

The thing is the market share is owed not to anti-competitive behavior, it's mostly about almost every other comer having some bullshit agenda that actively makes them put forward a worse option.
GOG being an exception, mostly held back by lack of resources rather than the sorts of things Jim Sweeney want.