As long as you complete it, just keep it out there. You never know when your half-baked idea might result in a lead for something new. It’s fun to go back to old projects and finish them with new skills you’ve acquired over the years.
I have a couple Github repos with a lot of stars and a bunch of pull requests and issues. I used to work actively on them. However in the past 7 months I've been constantly being told at work that what I do isn't enough, without constructive feedback. Pretty much every single 1:1 is "you're not doing enough" and no action items, not enough compute to do what I should be doing, being left out of meetings, and no acces…
In any case your priority should be to find a way to fix this before you burn out for good. Losing energy for your spare time is already a big deal. You are mentioning brain draining. 7 months is a long time. Your job should be supporting your life and what you want to spend your time on, not the other way around.
If you can maybe take holidays. A good break.
Good luck, you can do this.