Have you tried helping someone? If not, find someone who needs help, then help them.
This seems to be a good way to hack past the kind of burnout you're talking about.
It's best if the thing a person needs help with is something you like to do (or once liked to do). It won't even seem like you're helping them, but you will be. Even better if the person needs help with something you've wanted to learn how to do but never could manage fit in.
A magical thing happens when you help someone. You forget about yourself. Maybe for only a little while, but that can really help reset what's not working in life.
There are so many ways to help people. You can help them online, pseudonymously if you prefer. You can help them publicly. You can volunteer to do something for an organization that has things that need to be done.
Kids need a lot of help. The elderly need a lot of help. Recently unemployed people need a lot of help. There are organization serving all of them, and they can all use your help.
It sounds like you have skills and experience that could help a lot of people. You may have already helped someone just by sharing your own experience that happens to overlap with someone else's.