CRISPR Cas9 is a tool that allows for precise cleavage and insertion of DNA at a specific point.
But most of the damage done to incels is mutli-loci, and developmental, meaning gene editing won't be able to fix it. You can't just edit a few genes to make your chin grow forward, because it involves hundreds of genes during a specific window of development.
CRISPR is for people with simple single gene genetic diseases (cystic fibrosis) or for engineering of fetus of the super rich to produce gattaca tier super humans.