as much as the poster was blunt, I do suspect she’s right, it’s not about the wrong food, it’s about eating too much.
the simple truth is this forum and many others are littered with people who think they are medical marvels. And not losing weight in a deficit. It is not possible.
if we burn off more energy than we consume, we burn fat or muscle to make up the deficit, this makes our body lighter, we do not consistently back fill that loss with extra blood, fluid, or anything else, not week after week.
the simple undisputable fact is that you don’t loose weight for several weeks you’re eating to maintenance, you take your weekly cals and average them per day. As we drop weight we need less cals. And it is incredibly easy to underestimate calories. From drinks, how we cook, the lot. And it is incredibly easy to over estimate how much we burn,
what is not easy, or even possible, is to consistently eat in a defecit, and our bodies remain the same weight, thus fueling our additional energy needs with will or gaining pounds and pounds of water and blood.
as such, the op is eating to maintenance.