You will find precious few Protestants who have read the works of any church father-much like the Catholics and Orthodox. (I never did until a few years ago.) Nor will you find the ones who have read Augustine (including myself) to consider his writings "inspired and faultless".
The difference is simply that Orthodox and Catholic have others who read these works and tells them what to believe. Protestants read these works (hopefully) and make up their own minds. Protestants believe the Holy Spirit will lead people to all truths.
You may read the Desert Fathers, the Cappadocian Fathers and St. Gregory Palams too. It may shed some light on your conviction.
But to respond to your last sentence -- do you think Judas thought that Satan was his guide?
Hiding behind this catch-all Trump card "I believe the Holy Spirit is guiding me" is something that is not only freely absued, but something that has been shown to be historically and theologically invalid on numerous occasions.