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.
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