Sorry to hear about your burnout. I’ve experienced burnout hard in so many areas of life in the past, and I wouldn’t wish it upon anyone. …
… In fact, since I’ve burnt out on so many things in the past, I’ve even adapted the metaphor to something more like: It’s not even a marathon, it’s more like a pleasant stroll in the park!
In other words, if it’s not enjoyable, then maybe I need to slow down even more, reduce the stress factor, and tap into the natural motivation of something just being fun to do!
With that in mind, I found a thread on these forums for like-minded folks called 
Let’s Durtle the Scenic Route 
, and I frequently recommend it (i.e. the ‘philosophy’/idea behind it) for people who are dealing with burnout or just plain old fatigue. Worth checking out, IMHO.
I had a similar burnout/reset story when I reached level 28 some time ago, and I detailed how I came to my decision to reset here: After a long absence, I reset (to level 7), and I’m glad I did. Overall, I think resetting is often a very helpful thing to do, especially if reviews become daunting, overwhelming, or even painful.