Your siblings grew up with slightly different parents than you did. Same house, different years.

Parents change, and the version each child gets is set by whatever was happening at the time. Money, work, health, how tired everyone was, which crisis was running. An older sibling may have had stricter rules and a younger one a distracted household, and both are telling the truth about the same family. That is why arguments about what childhood was like never resolve.

Try asking a sibling what they remember about a year you both lived through. Listen for the parts that do not match yours without correcting them. It tends to make them less of a rival and more of a witness.