I feel your pain! I’ve had several bouts of sibo as it tends to come back. This will be hard to hear but very severe diet changes are required, and long term at that. It’s tough to adjust but it’s worth it and you do get used to it. If you can go six months without symptoms you might be able to add some things back, but take it slow. The diet is basically no grains, no sweeteners, no fruit, no dairy. Tough stuff but doable. Some doctors will say that’s too restrictive, and I listened to them for too long, only to find I could not get well. Also, no probiotics until symptom free for several weeks. IBS comes with sibo but you’ll have to deal with that until sibo is gone.