Though there definitely is a lot of slop out there (even before that term gained a new meaning) I think it's hard to argue that there are so many more high quality games now than there ever were before just because it's so much easier to develop and distribute them.
Also don't rose-colored-glasses older games either, there was a lot of absolute trash. Bargain bins existed for a reason. That said just because a game is bad doesn't mean it isn't still fun in some way, even if for its brokenness. There's an entire genre of games these days where the basic principle is "if you find a bug, but it's funny, it's now a feature".