This probably won't help at all - my Rowdy does not care for dry food either, but......... the only dry food that he will eat a little bit of is Solid Gold Wee Bits. He absolutely will not touch anything with a large kibble, so kibble size might be important, maybe not.
Also, about the only way I get him to eat the dry kibble is to hand feed him. And I have to hand feed Rexy at the same time and Rexy will eat ANYTHING. So, I feed a few kibbles to Rexy and then MAYBE..... Rowdy will eat a few. At times, Rowdy will actually eat a lot of kibbles, other times he won't touch it even when I hand feed it and when Rexy is eating. Go figure!
I have also drizzled a little bit of kayro syrup on the kibbles to get Rowdy started - not enough to coat every kibble, just a tiny bit on the top and then maybe he will start eating the kibbles out of a bowl, and sometimes (not always) keep going.
I know what you mean about how frustrating it is to try to get them to eat what you know they should be eating.