the argument against multi-verse theory, which I used to deeply believe in the past, falls on its head the more you think about it
if you have infinite versions of yourself in infinite bubble universes, then you'd have tons of versions of yourself invading this timeline
some may say they cannot travel back in the past, but mind you, those advanced versions have it figured it out already. and in an infinite bubble multi-verse, you don't merely have 1 version figuring out time-travel, but infinite versions
what would this timeline look like if that were actually possible? it would be a busy motorway for infinite versions of yourself coming to visit this timeline. also, if my version is too stupid in all the universes, there are 8 billion other people to do it before me. Where are they?
people like to fantasize about these things, going so far in their imaginings just for a glimmer of hope that they themselves may become gods, but at the same time refuse to acknowledge an actual God, who is above space and time and created all things. That is somehow harder to conceive for them. I used to be like that. Now I'm wiser