L.R.
Hi Mom...I totally feel your pain. I've been 40-50 lbs overweight my entire adult life, done WW more times than I can remember, and always gained back the few pounds I managed to lose within months.
Try some other plans. So far it's been WW and OA, but there's lots of other stuff out there. Last October I finally found a plan that worked for me, and dropped 50 lbs over the winter. I've never felt better! My food addiction has crept back and I regained 10 of those pounds, but I know that I can lose it again easily and quickly. I travel a LOT for work, and this makes it difficult (eating yummy food in good restaurants on an expense account an average of 3 days every week), but I know when I screw my head back on I'll lose those 10 lbs and more.
Just keep experimenting with different plans. Jenny, Nutrisystem, etc. I did become a health coach for the plan I used, but I'll keep that to myself for now since I don't want this to come across as a sales pitch.
You're NOT destined to live your life overweight. There IS something out there that will work for you. You just need to find the right fit.