I think you and I have very similar feelings about Biden. I donated to Bernie’s campaign and wasn’t happy when Biden won the primaries last go around. But overall, he did much better than I expected. His biggest blunders I think have been only supporting Ukraine enough to stay on their heels and not actually beat back the invasion and supporting Israel after they’ve shown they’re either committing genocide or they’re so incompetent they shouldn’t be fighting a war. Also, he ignored the border for too long, but I think any democrat would have made that mistake as well.
If you have Android, you should check out Shelter or Island (Shelter is open source, but Island is in the play store). It’s not what you’re describing, but it accomplishes something similar. It essentially leverages Androids ability to create a work profile to create another isolated profile on your phone. That profile can have spoofed, useless data fed to it or even just be disabled when you’re not using it.