"so hard to find a medical doctor who's willing to treat this syndrome through diet rather than prescribing pills to relieve the symptoms. I mean I'm sure there are docs like that but they seem to be pretty rare"
Have you considered seeing a Naturopath? I just started seeing one, and it's the first time I have a doctor who is telling me it's not normal to live with these symptoms and that we have to do everything we can to figure out a good treatment for me. Worst case scenario from seeing a Naturopath would be trying something different, and learning about healthy foods (that will also fit into your diet for IBS).
I started going to mine after a round of useless antibiotics prescribed for a non-existent urinary tract infection. I too was getting frustrated with doctors looking me over and shoving drugs at me without trying to get to the bottom of things.