I'm not a psychologist, and not really very interested in diagnosing people I don't know on the internet. I wouldn't call it anger exactly - more of a tightness, an aggression that's under the surface but permeates everything, especially her interactions with the other people on the show. It's made doubly awkward because it's wrapped up in a faux relaxed, giggle joy. There's nothing worse than watching a very up-tight person trying to exude relaxed, chilled joy. It's mildly stressful to watch.
I once worked with a client who had been through the wringer with internet criticisms (the substance of which were valid and needed addressing but she persisted in seeing them as merely 'jealous haters'). She wanted to produce content which would address the critics without overtly doing so, and the first rush footage was all dreadful because it had exactly this energy. I tried to address it directly and explain why it wasn't working. Reader, she fired me. That's fine because the finished products were dreadful and I'd rather not take someone's coin if I don't believe and feel comfortable with what they're doing. Fortunately, I no longer need to clutch on to every scrap of revenue like I used to when I was starting out on my own.
Another influencer, who I have NOT worked with, but who has this same angry energy masquerading as confidence, is Jack Monroe, and that's why she is similarly difficult to watch.
Viewers want to watch presenters who make us feel relaxed, easy and engaged, not nervous and uptight.