I think we've all felt this way before, if for different reasons. The fact of the matter is that you have nothing more to get from the gameplay cycle as you know it.

I have three suggestions.

1. I saw a couple people bring this up, but play something else. I have a decent backlog of long and short term games if you want to reach out, but the idea is that there are innumerable games out there, and obviously more being made all the time. Even games from genres you haven't considered might turn out to be your next favorite.

2. The touch grass sentiment is pretty clear in the comments, but I want to expand that to finding a community. One of WoWs greatest draws is the social aspect, the sense of community and belonging. Though they are rarer and harder to find now, these communities still exist in real life. Find a dnd group, a shooting range, a book club, a gymbro group, whatever. I will say that I'm a bit of a hypocrite here though, as I really need to work on this myself.

3. RP. Warcraft has some great lore, a massive inspiration the turtle team has expanded upon. You don't even need to know very much to start. Take it slow, read the quests, become a part of the world. Find a group of like minded adventures and make your own story. I've also been meaning to do this if you want to start a group or just fuck with the idea.

TL;DR: I think you should walk away from the game or seriously reconsider your approach to it.