Awe, rant away!

That's what we're here for.
But we're also here to help you try to tackled the problems that are holding you back.
Use that FB picture as a motivator to change your diet! What is your plan? Are you calorie counting or doing some other method? What does work for you? What doesn't? Why not? What can you do to counter the things that are holding you back?
I'm a huge advocate for exercise, but I also firmly believe that it's 80% diet and 20% exercise, so you really need to get the diet under control. The exercise, for me, is about toning and about health. You want to make sure you schedule time to exercise because it's good for your health and it can help you burn off a small portion of your diet. You have to exercise and awful lot to burn significant calories.
I think I might have a suggestion for you. I'm quite impressed that you were able to maintain (or mostly maintain) for a period of time. My friend is on a plan where she goes into weight loss mode for 6-12 weeks and then goes into maintenance mode for 6 weeks. Then she repeats the cycle. There's something comforting about being able to buckled down and white knuckle through it when you have a deadline.
I placed a deadline on myself of a different sort. I told myself I was going to stay on plan no matter what for one year. I found that to work really well for me.
What do you think will work for you?