One of my dog's sisters was like that. She would not eat any of the kibble. The owners had to go through a bunch of different brands until they found one that their pup was interested in. It just so happens that it's one of the more expensive brands....Orijen. They have no choice. That's the only one the dog eats. My point is, have you tried a bunch of other brands? Tried other "flavors" like fish/salmon based or duck based or etc.
Also, once you start adding things that entice the pup to eat kibble like broth or raw meats or canned food or etc...you've opened Pandora's box. The pup's gonna start expecting all the additions and won't touch the food without it. I know all about it. I added shredded chicken, broth, eggs, or canned food to my previous dog's kibble. In fact the kibble was a mixture of 2 different brands. I had no choice because I had to force him to eat. If he didn't, he would lose weight really fast because he had EPI. If you're deadest on kibble, then keep looking for a brand that works. Also, if you don't mind the extra work of adding food to entice your dog to eat, then keep doing it