Gaming burnout is real. Consider all the games you've played over the years - every new game you pick up has more competition for your enjoyment than the last. RPG's are my bread and butter genre, but I rarely play them anymore because I recognize builds too easily. I come up with something that nearly breaks any challenge the game has, and can't force myself to intentionally weaken my setup or experiment the way I used to.

Play a lot of nearly any genre, and you'll begin to predict what's coming, and no longer get hit by an incredible surprise or mechanic you wouldn't have expected. Fewer and fewer surprises and innovations- everything that you've seen before in X game becomes a quality comparison when it comes up in Y game. Competetive multiplayer games dominate the industry because the complexity of a human opponent is incredibly hard to match.

There's nothing wrong with you - you just need to broaden your horizons. Either try out some genres you never thought you'd like, or try out new ways to spend your free time that aren't gaming, and come back later. We want every new game we play to feel new the way they did when we first started gaming, but new games often reuse what's been done before, so depending on you and the title, it's possible very little of what you encounter in a "new" game is actually new to you.