Is it normal i'm annoyed at this person?

So this chick I know has a blog but I doubt she knows I discovered it because it was slightly hidden. I decided to click on it anyway and read a few bits. She is 350 pounds at 5'4 and her blog is about her anorexia.

Now before some of you go batshit crazy on me, I AM completely aware that there are overweight and obese people with anorexia. HOWEVER, 1-she is not "just obese", she is morbidly obese. 2-Read on.

In her blog, she writes how she randomly started to become anorexic 2 months back and that she only eats 1200 calories a day. I had to laugh a bit at this, just a bit because 1200 is still in healthy range. On top of that, she wrote how she all of a sudden realized she was getting anorexia and now she's consumed by it. She literally wrote, "When I'm out with the family, I have to pretend I eat normal so they don't suspect I am anorexic. So the other day, for example, I went to a restaurant and they ordered an appetizer so I had to eat at least 3 chicken fingers. Then, for my meal, again, not letting them suspect me of having an eating disorder, I ordered a hamburger. The hamburger came with fries and coleslaw so I had to just shovel it down but I feel like one day, I won't have the fries or the appetizer and they'll know I'm anorexic. My ultimate goal is to be 120 pounds but I know that's nearly underweight but that's what an eating disorder will do to you."

Is this sick or what? I see her in person and she's honestly eating ALL day long. Seriously, for lunch, she had an entire foot long sandwich while I was sat there at my normal weight eating a freaking romaine lettuce salad with vinegar dressing.

is it normal I'm annoyed by her and want to scream at her face?