Maybe you can try to accept that the older versions of yourself will continue to exist somewhere inside you, no matter how much you grow and evolve. Watching them resurface from time to time doesn’t mean the newer versions of yourself never existed. It just means… that you’re human. You’re human, and it’s okay to occasionally fall back into all that you used to be. It's okay.
And it’s also a lesson that other people you may come across in life may be similar to that previous version of you, and instead of judging them, you should see that they too will grow and evolve over time.