Clean Eating Sweet and Sour Chicken

I found this recipe on Pinterest and decided to give it a try.  I followed the directions pretty exactly.  The only thing I think that might have caused a difference is that the original recipe is that it said to use a light coating of flour and I wasn't super careful about that.

I really love the flavor of this dish, but the coating left something to be desired.  It was very flour-y rather than a sticky or crunchy or breaded taste.  Grain-y.  I really wanted this to work better than it did and I'm not quite sure what to do differently. I'd welcome any suggestions, though!  Maybe coconut flour just takes some getting used to, but ... blah.