As a disabled person who struggles to maintain a healthy weight, I'll tell you that yours is not an unpopular opinion. I know that mine is not the typical experience, and there are far more people who are overweight for reasons within their control, but let's not pretend the people celebrating obesity are the norm.

Regardless of your problems, shame is never productive. Looking down on people you perceive as "fat, lazy fucks," is just a way to make yourself feel better about yourself. "God, I'm glad I'm not like that piece of shit anymore." It's a form of self loathing, hating the way you used to be.

Be kinder to the person you used to be. That person probably could have used to positive support and thoughtful advice. Maybe then you wouldn't have needed to turn your entire life upside down just to get healthy. Don't be ashamed of your past choices. Own them, recognize why you made them, and learn how to be a better person tomorrow.