It's common knowledge that social media people have to put up with a ton of threats and random insults and stuff. That's obviously unacceptable. But I doubt Amelia gets lots of that. We'd know, the way she already freaks out when people ask about her lip fillers.
She really just cannot cope with any type of comment that isn't high praise.
As for the "people are just jealous/ people hate to see other happy" type thing her remaining loyal followers dish out, I've thought about that. Why do I watch her if she makes me angry - don't like it, don't watch it, right? But since I am not jealous and I don't hate happiness, I suppose it's mostly morbid curiosity regarding where she'll go next. I'll admit that's not exactly nice, but it is entertaining. And frankly, if you put content on the internet, the least you have to expect is that some people will find it really bad and just watch to see the trainwreck unfold. Only way to stop this is to consider what criticism may be valid and thus stop wrecking the train. I'd be the first to welcome it if her content went back to bearable.