Just going to add my 18st 3lb 5ft 5 opinion here..
I find it fascinating that we all automatically assumed the women in OP's original post were all overweight. No one said this, this was not confirmed and yet we assumed it. Why?
Simple fact of the matter is that women use weight to pitch themselves against each other. It's become tribal and there's fault on both sides for this. Overweight women feel bullied and victimised by society at large and feel that people they perceive as slim don't understand their weight gain; and slim women feel their efforts are written off as luck and that they have a right to feel proud that is cowed by overweight people writing this off as "bragging". Who is it that's doing the bullying and making both tribes feel this way if not just other women?? We are all responsible for this problem.
Just stop it.
Stop classifying yourself as overweight or slim and just recognize that both these categories are temporary states, not life affirming personality traits. If a slim person eats more, they become an overweight person. Equally, if an overweight person eats less and moves more, they will eventually become a slim person. That's not up for debate, that's a well evidenced and completely scientifically accepted fact. I've heard people say that eat less and move more is just a theory.. to those people: So is gravity, so float the fuck away. You don't help anyone by denying this.
We are all both and neither fat or thin, i refer to this as Schrodinger's obesity 
The reasons WHY we are obese, overweight, healthy or underweight are all relevant and THIS is where the distinction between luck and effort is made. There's no such thing as naturally skinny or naturally obese. However, the way we think, feel and consume our food all have an impact on our weight and it's this that some people are blessed with and others are not. The habits we form around food are largely under researched until very recently and only now are scientists actually focusing on the psychology of obesity rather than the physicality.
The good news is absolutely every body (physically and mentally differently-abled bodies aside) is capable of reaching and maintaining a healthy weight. The difficulty of this largely depends on the individual and this is why we see some people very successfully lose weight and some people try and fail for years. It has absolutely nothing to do with metabolism or anything else. It's to do with resolve, self control and motivation. You could have a lightening fast metabolism but if you can only diet for a few days before throwing in the towel and eating an entire pizza (just me? 
), no metabolism in the world is going to keep you slim long term. Equally, your metabolism could be sluggish but if you consistently eat fewer calories than you expend, you'll lose weight.
I'm currently very overweight (morbidly obese I think?) and I've never been lower than the obese category in my life. My mother put me on my first diet (slimfast shakes.. it was the 90's ) when I was 7 years old. My medical history shows I was declared too fat at 3 years old and every health check since records me at obese or above. I have been on some form of diet since I was 7 and yet gained a stone a year consistently until I was 18 (ish).
I'm lucky.
I'm lucky because I currently have no obesity related health concerns and I've recently discovered my will power (it was hiding underneath by belly fat, who knew??). I've begun eating correctly and exercising regularly. Reliably I'm dropping the weight now at a rate of around 3.5lbs per week.
The change for me happened when I gave up telling myself my obesity was the result of genes or luck and actually accepted all that I've stated above. As you can see, I did a lot of thinking. I wrote most of it down (I've had CBT for anxiety before)and most importantly, I stopped thinking of myself as a fat woman. I'm not a fat woman, I'm a woman. That's it. That's all there is.
OP, well done on your weight loss, but don't lose sight of why you went through that and did it. Find your reasons again and revisit them, you'll find it easier to ignore people once you realise you're now a healthy and balanced individual, and no daft comment from an insensitive person can take that away. FWIW, I've been called all sorts throughout my life but since my day of thinking (this is what I call the day I made the mental change I needed), none of it has hurt at all because I just feel so sorry for people who feel the need to belong to a tribe so strongly that they base their self worth on what they weigh.
Let go of that and you'll feel a lot better :)
Sorry for the essay