5yrs chronic diarrhea every bowel movement watery, sudden, urgency, unbearable smell. Gastric bypass 5yrs ago. Partial colon removed, hernia 3yrs ago?

Need a G.I. consultation. This is a problem that is best solved with a consultation with a gastroenterologist. If you have already seen a gastroenterologist and you're not getting any better than you need to see a new one.
Alter diet. Try a fiber supplement like metamucil on a daily basis. Also, dairy products may be a problem.