You're right about that. Marinating in the mistakes of our past is not helpful. But remembering the past, even mistakes, is good, because we can learn from them. We can also use it as an opportunity to awaken and animate our gratitude toward God for his mercy and providence -- and to resolve to do better for love of him.
I know it's sometimes hard to forgive ourselves and move on. So if that's what you're saying, then "right on." 👍