Yeahh that's sadly true.. I am from Holland,where you can find some quiet beaches when the weather isn't that sunny, but when it is sunny,the people are there like ants.
I'm currently traveling in Italy and I am gonna try my very best to find empty beaches. Or I will just wake up early to be there before the other people arrive.
But I guess the Philippines or Indonesia might be the better Places for deserted beaches. I don't really know about South America and Africa though, but the Philippines has plenty. Oh can I book my ticket already? ✈️☀️