Your older sibling’s mistakes probably saved you from a few of your own. Thank them someday.

Plenty of what you avoided was not wisdom on your part. Somebody went first, got it wrong in public, and you watched the consequences from a safe distance and quietly adjusted. They paid for that information and you got it free. The ones who go first rarely get any credit for it, partly because the family story treats their mistakes as a cautionary tale rather than a service.

Say it to them at some point, plainly, that you learned from a thing they went through. Do not make it a joke about their worst year. Most people have never heard that from a younger sibling.