>CS:GO and DotA 2, which are both some of the most played games in the world?
Yes, I mean exactly those games, which are neither new nor ground breaking, and which were originally authored by outside firms/contractors, not valve. Since then, most of Valve's additions to the games are in the form of monetization.
If you didn't notice the news articles, they even laid off almost all the people responsible for HL2 and its episodes, including the writer.