It is always an easy target, especially after some of the incredible success that their games have had, but Valve have made a number of mistakes in recent years, but almost all of them have been in aid of making Steam, and PC gaming in general, a better place. Steam Greenlight was Valve’s attempt to limit, or at least improve the quality of, games getting released on Steam. The idea was that these games would face a vote on Greenlight from the community; those with overwhelmingly positive votes would make it onto Steam, those without would linger until they improved their showing.
That was the idea anyway. Instead we had games from recognisable developers and publishers being forced through Greenlight, while other games, extremely rubbish ones, that used Valve’s proprietary engine would skip the process. Steam Greenlight has taken a back seat on Steam recently though; with games coming out and being filtered into “New Releases” and “Popular New Releases.” Steam’s problems continue.