I don't think this really happened to me.

I started singing in front of people with a great friend when we were 13 in 1963 as a folk duet. We both carried a tune well and actually harmonized pretty good. We both played Gibson small body guitars and I learned how to chord a 5-string Kay banjo. We were invited to play at different hootenanys and for other different affairs and parties some times being the youngest performers there.

We were The Kingston Trio minus one. We practiced and worked pretty hard. We had a lot of fun at it and were lucky to have had the opportunities. We took ourselves seriously but not enough to not enjoy music for the good time that it gave us and who we played for.
In no way were we ever smarmy about it. Years later, this same friend and I formed a fairly successful country-rock band that played in the clubs for quite a few years and still occasionally gets together for a reunion gig. Though he has "retired" I continue to play and perform, mostly in bluegrass scenarios sometimes for money, other times just for the fun of it.

I give kids credit today for trying. But part of growing up is taking your chances. If you are going to get up and perform in front of people with the exception of your family (you hope!) you have to be prepared that someone is going to yell out, "you suck!" To me, having that happen to you and how you handle it, is a big part of learning how to grow up.