Echoing what other people have already said, I went through something similar; it got better when I realized a few things:
-One, retro/indie games may be your new best friend. I realized that many of the game types I really like aren't a big part of the AAA scene. As a kid, I fell in love with gaming with 2D Action games like Mega Man/Castlevania/Metroid when I was younger, but those games rarely get made anymore unless they're indie. I didn't get around to playing the Mega Man X games (past the first one) or Castlevania: Symphony of the Night until very recently, and when I did, I loved them more than many AAA games I've recently played. You mentioned JRPGs and Stealth games, two genres that aren't doing so hot in the AAA world, but there are plenty of good games in those genres if you look back to the older stuff or the indie stuff. Heck, for that matter, go back and play some old favorites. Recently re-visiting one of my old favorite Final Fantasy games really helped re-ignite my love for gaming.
-Two, it's perfectly valid to be picky about how you spend your gaming time, and it doesn't make you a hipster or an elitist to consider the bulk of games not worth your time. Tastes mature over time. Think about food. Do all the things you thought were tasty when you were younger still taste good to you today? Probably not. As you grew up and tried new foods, your taste palette became more refined to the point where certain foods (especially certain high-sugar, highly-processed foodstuffs) no longer satisfied your taste buds the way they used to. Gaming can work the same way; when you've been gaming for years you can get the point where certain tropes of the genre that you previously liked (or didn't notice) become unappealing.
Three, sometimes it's good to just take a break. I went on a one-month hiatus from gaming a couple years ago, and it really helped me get some perspective on a lot of things, gaming included.