Amber is a lifestyle vlogger, react channels often compare people in the same genre. It just so happens that Amber's genre is, and has been for years, being a bratty fat on the internet. Same with Haram Amy and Chantal. If Amber just happened to be morbidly obese, but her brand was quilting tutorials or woodworking or knitting, nobody would be reacting to her fat, she'd be offering a channel of value to those interested in a particular hobby. Amber (Chantal, and Amy) don't just happen to be fat, that is their brand, their only thing to offer, other than their shitty personalities. So of course they're going to be compared, if they wanted to be in a different category, they've had years to become fat, interesting people.
Consider Amber's thumbnails and clickbaity titles, what does she think we're watching her for? Who does she feel she should be compared to in reaction videos? Monetizing morbid obesity and making a career choice out of it is fucking bizarre , that there are multiple people doing it is bizarre multiplied. If she doesn't like being in this category, do something else. It's really that simple. She doesn't have to get skinny to get out of the category (though she should because she's a tiny step from immobility), she just needs to get interesting, get a skill, offer something to the world other than physical complaints, weight babbling, smacking her lips on camera, and the occasional crappy consumerism.
Becky is now living with her new girlfriend*
*Not legit speculation. I just made that up for the lols because late-january/early feb tis the season for amber to be dumped and left for someone else.