How do you grow marguerite daisies so they burst into a beautiful ball?

Other people's marguerite daisies turn into balls so easily, why does mine look so bad when I grow it!

The experts are showing off their photos again, their candy marguerites are so round and beautiful, I don't know how they grow them, they take shape so easily, while mine is completely different.

This is mine, it looks so ugly, is it because I haven't taken care of it well? But I've already tried my best.

Again it's other people's flowers, maybe I'm just not suited to growing flowers, and this is the only flower I've managed to keep alive. (Material from a netizen)