I needed to clean up my Google account but couldn’t remove all my YouTube subscriptions because Google doesn’t allow it, SO FUCK YOU GOOGLE. I searched online for a solution but only found broken scripts. So, I made my own working script to unsubscribe from all channels efficiently. Sharing it here in case anyone else is in the same boat. Hope it helps!
It may be easier with a userscript. It runs in the browser and automates clicks, so it’s less obvious