Take seriously the recommendation to David Klein's book. Self healing for colitis.
SCD diet works sort of because eliminates milk, soy, wheat as common irritants but not good enough. Plus meat eaters relapse in UC and Crohns according to studies.
Become a strict vegetarian. Get Kleins book and give it a real whirl for 4-8 weeks to a t.
My wife would get bloated on fruit too but not any more. She lives on bananas and cantalope etc. Food combining is a part of the issue. Perhaps in colitis proper digestion is impaired.
Her bloating went away in 3 days and her stomach is flat as a board now. She used to feel and look like she was 3-4 months pregnant. So uncomfortable.