I'm very much aware Dr Pimental's research is not specific to SIBO/IMO and that his research is very comprehensive regarding GI ailments. Nonetheless, since I was speaking about "my" experience" I made reference to only that.
There is not indeed a "silver bullet" - if that was the case, I daresay he and many others would be a billionare. That said....
I'm very much aware/educated about the complexities of the microbiome - and that bacteria is neither good nor bad - and that SIBO is about their residence where they don't belong (small intestine). Hence the name "Small Intestinal Bacterial Overgrowth".
Yes indeed I know I have SIBO -C (not just IMO) (ref the hydrogen, etc. you mentioned) - yes, Allicin for methane, and for sure I'm aware it's tough (been dealing with it for 5 years at least). In addition to Allicin, there are other antimicrobials (and Rx combos) that do work well - I've managed remission for months at a time. However...
...there are other variables that factor into the irradication of SIBO-C and as well, treatment approaches (which I mentioned in my response to "caroljmelville" below.