If you complete phone screens on 1 out of every 10 inquiries you send, you are doing very well in my opinion.

If those phone screens do not turn into full interviews or offers, that is a statement on how they went, not on company responsiveness.

Frankly, I don't think your stats show a lack of response at all. I think they are very reasonable, as some level of non-responsiveness is natural, when you account for the fact that you gave them enough information to summarily dismiss you from consideration if you don't match their needs or culture.