Breeders who responsibly create a hybrid breed for sporting or companion purposes. Doesn't matter if all applicable health testing is done and every puppy has a home in advance before it's even born, people seem to immediately think backyard breeder if a dog isn't purebred.
But pugs are "purebred" which further highlights the point. A pug crossbreed with a longer-snouted breed would probably be healthier. You can't reliably criticize hybrid breeds without criticizing breeding as a whole.
All breeds were created by crossbreeding. But for some reason the society invented a cutoff point beyond which crossbreeding is not okay.
Because Labradoodles wound up very cute but inherited all the bad traits from both breeds and almost none of the good. Just a bundle of nerves and health issues, or so Ive heard/read