Yay! It makes my-current-self happy that your-past-self said nice things about my-past-selves comment. Go, my-past-self!
With that silly comment of mine out of the way, there’s one thing I want to add which is that I think we should maybe show a bit of leniency towards our past selves. Keep in mind that our past selves had less experience than us. They didn’t have all the experiences that shaped us. For better or for worse. When we say “I didn’t know.” maybe to make things more interesting we could instead say “My past self didn’t know.” at least once, just for the fun of it.
Physically speaking, what our past selves did have though was a lot more potential than us. They had the potential to become our current self and at least in theory they also had the potential to become different versions of our current self. Some of them we might consider better, others worse. These versions would all have a different experience than our current self. Maybe even a slightly different thought going through ones head can be an experience with a big impact on the future.
I guess some people do say that they need to makes ones past self, or even another persons past self proud. One thing that I thought was funny was hearing another person saying “That will be future me’s problem.”. So in a way we really do take snapshots and project things onto them.