It's her first serious lolcow moment and no one to blame but herself. All the other shit like scuffed streams and being unprepared or sounding bored/uninterested in collabs are pretty negligible compared to this.
Can she bounce back? Sure. She can take a page out of Gura's playbook and just not be perpetually online on Twitter and pay attention to all the renewed hating and heckling she just gave ammo to on there. I do think it put a serious dent on her "rapper" persona though and really makes her look like a poser, past work/output notwithstanding. And this is coming from someone who really liked a lot of her Demondice work.
Just put your fucking head down and stream & make your music, bitch. A prolonged period of no-incident and good behavior does a world of wonder in making up for past embarrassing shit and we've seen other Youtube personalities with worst incidents get past it by just being on good behavior.
And fucking stop boozing on your own. There's a world of difference between "having a drink" and "routinely getting drunk" and she's squarely in the latter.