I was starting to feel like I was in a dead end job a couple years back and then I started programming like I wanted to quit but leave the company in a good position. I automated everything. All of a sudden I had copious amounts of spare time to work on interesting projects and the business started growing rapidly as we were able to scale easily to larger operations and add more revenue with fewer mistakes and more customer satisfaction. I kept up the same pattern, and a couple years later the company is doing better than ever, I've gotten raises, etc. I've also been able to move-on from boring maintenance to new projects as the old stuff practically runs itself.

Moral of the story is, if you are getting bored you're probably not automating enough or making tools to let non-tech people do most day to day stuff. If your management has a problem with that, or prevents you from doing that, then you should move on.