Same for me. A medically-supervised diet and a 12 Step Program at Overeaters Anonymous has helped me keep about 40 lbs off, but an additional 20 yo-yos for me due to addiction to food. The difficulty with a food addiction is that, unlike alcohol, drugs, smoking or gambling, you cannot completely quit food. Ever. Someone I know who also struggled with food described it as, "unleashing the tiger" 3 times a day and then trying to put it back in its cage.
Being "sober" from compulsive overeating in a 12-step program is called "abstinence", but the challenge is that everyone defines abstinence differently. Some call it 3 meals a day with no snacks, some call it no sugar. There are a million possibilities because there is no way to cut out eating entirely. Soylent, to me, felt like a chance to fuel oneself in a way that could easily be defined as abstinence. Though I still wouldn't consume it 100% of the time, when I did have Soylent, that would be another relief-filled instance where I wouldn't have to struggle with Choice, which is where the struggle and ensuing guilt often stems from. You're not alone, OP!