I feel like men's true intention is that they hate overweight women even more than criminals (Bipolar Disorder)

My boyfriend has started openly saying how much he hates my overweight appearance.
I am 170cm / 86kg.
Today, we measured my thigh and waist circumference together,
and my thighs were 24 inches and my waist was 36 inches.
But there is this girl who bullied me in school, and she recently passed the teacher certification exam for math and got assigned to a school. She runs a blog, and my boyfriend looked her up (he does look things up for my sake), saying she is 173cm/50kg, extremely thin, and has a beautiful body. He said her waist is probably 24 inches, not her thighs, and when I mentioned her name is Ji-sun, he laughed and asked if "Ji-sun's waist walks around on two legs."
And he constantly looks at thin female idols and says that being that thin is natural for women in their 20s, which feels like he's persecuting me.
This isn't even a post asking you all to join in on cursing him.
I know my boyfriend's preference is the slender type, and I'm sorry that my mental health issues are hereditary, but I feel even more sorry because I've also gained weight.
Why do bipolar medication cause so much weight gain? I truly resent it so much.
I hope better new drugs are developed!
Also, I've been using Wegovy for about a year and a half, paying about 400,000 won a month, and I managed to drop from 102kg to 86kg...
But the weight loss has slowed down, and because I keep secretly ordering and eating snacks, my credit cards have all been taken away from me.
I have lost a lot of weight and I am continuing to lose it.