Welcome to Spark People ! You can't beat yourself up because you regained some of the weight. WLS has helped many people regain their health. Unfortunately, many people who've had the surgery have regained too. I've said this in past, people think losing weight is hard. No, keeping it off is much harder. Now, a person has to find the right balance of nutrition and exercise to keep the weight off. And that's not an easy thing.
You can't change the past, but you CAN influence and change the future. Start with some simple changes first. Remember, you're trying to change habits learned over a life time. That's not going to happen overnight, a week, a month or even a year. Change takes time. Thus the need to be patient with yourself and your body.
Set some simple goals first. Example, if you haven't been eating your veggies, set a goal to eat 2-3 servings each day for one week. If you haven't been exercising, set a goal to take a 30 minute walk each day for one week. If you're not drinking your water, set a goal to drink 2-4 glasses each day for one week. Once you've achieved these goals, then you set new ones.
And that's how good health starts. Don't look at weight loss or good health with an "all or nothing" mentality. If the only healthy thing you did for yourself today was drink 8 glasses of water, that's still a step in the right direction. Every little bit really does make a difference.
Start slowly. Set some simple goals. Be patient with yourself and your body.