There are terrible games every year, adn there are memorable ones every year. Nothing's really changed in that sense IMO.
What's changed is that today there so much on offer, that its easier to look at the best thing there is in any given category and despise everything else. Back in the day, that didn't work, there WAS no backlog, there WAS no Steam Sale, only the budget bin where you could find the older titles for a smaller price, which would then push you into getting that after all because you completed everything else.
Nah. You gotta look around more then. Pillars of Eternity, Tyranny, Torment: Tides of Numblabla; Divinity OS2... there's a lot to be had these days. RPG is stronger than ever tbh. And if you like the numbers game in your RPG, there are half a dozen very strong Diablo clones out; or super creative stuff such as Darkest Dungeon.
The true puzzling though, yes you're probably right about that. Puzzle games have really also carved out a segment of their own; Talos Principle, The Witness, etc. And they have married with the RPG too, in the form of things like this:
http://www.grimrock.net/