The issue is really that there are so many games out there, there's no reason to play a mediocre one, so a B- game might as well be an F. Back in the day we would rent games for a weekend, and they would be awful, but we would keep at it because that's what we had. We would even re-rent awful games.

But now if you play a game that's only okay, why would you bother continuing? You can just ditch it, maybe even get a refund, and buy a game with better ratings. There's no shortage of those. So now there's far less reason to power through a game that's only okay.