I believe you because I've been to my share of quack doctors over the years dealing with this condition until I found a fairly good one that did a proper biopsy and finally started me on Antibiotics to get the bacterial infection under control. But now being off those Antibiotics for several months now after taking them for 15 years I feel so much better.
Try some of my suggestions with the oral and topical treatments. They have worked better for me than Antibiotics and I had severe folliculitis. The symptoms are under control and I no longer even get the occasional flare-up so there is hope coming from someone that has had folliculitis for 20 years!