My mum used to have a physical album of family pictures, most of which were hugely embarrassing. But, at least, I had some control who could view these. Some came into my possession after she died and I did not hesitate to destroy each and every one of them.
Calling something "embarrassing" leaves a lot of room for interpretation so I can't comment on your specific situation, but I have pictures my mom took of me as a baby naked, breastfeeding, etc and I would never consider destroying these. I also generally find it weird when adults consider something they did before the age of 5 or so embarrassing. Like you're a literal tiny child not responsible for your actions - nothing you do is embarrassing because very little is under your conscious control.
What’s so memorable or “heirloom” about a crappy or embarrassing picture of yourself taken by someone else? It’s not as if the relative lovingly painted it from scratch - it’s just a photograph.
Our family photos included one particular photo of me, a rear view holding a garden hose.
And it was extremely embarrassing, but not because of its subject matter. It was embarrassing because, for decades, my mother used it as a weapon against me. It was one of those things to emasculate and humiliate me for being a boy and for having a natural body. It was a way to tease me and implemented as a source of shame.
It was just another brick in the wall, of course, but unfortunately I didn't get proper access to burn it when I had the chance. It might still exist, for all I know. I may perhaps eventually get a golden opportunity for final satisfaction.
My mum used to have a physical album of family pictures, most of which were hugely embarrassing. But, at least, I had some control who could view these. Some came into my possession after she died and I did not hesitate to destroy each and every one of them.