#1 - Don't waste time beating up on yourself. You have MAINTAINED a loss of 111 pounds.
#2 - Get back to basics, log all your food, measure your water, 30-30-30, protein then veggies, then fruit, then carbs
#3 - Take a break from processed foods and watch things that trigger you to overeat. For me, carbs make me crave more (and stupider choice) carbs. But you know what sets you off.
#4 - No alcohol or sweet drinks
It's really about getting back to what worked in the first place. I'm no expert on getting back on the wagon after surgery, but I've failed enough diet plans over the last 45 years to know what the reset button looks like. And, definitely, ask for support when you need it!