In her own words, and seems like its the way the company works, she had a 3 month ramp - which I presume is along the lines of training, mentoring, pairing, learning the ropes by example etc - and then let lose to get stuck in, which as she says has been only one month that overlaped a holiday period.
It sure seems like Cloudflare are just culling staff to me, or her manager has no managerial abilities and doesn't know how to give genuinely useful feedback.
If it was her performance that was in question, there would be a trail, maybe even a car crash worth of evidence to back up that claim.
I don't think she will have issues finding work, unless having high standards, conducting yourself in a professional manner, and fighting for yourself and for your peers are considered a bad things.
I think Richard Branson (Virgin) once said, "Treat your staff how you would like them to treat your best customer." - unfortunatrly that doesn't appear to be the mantra at Cloudflare.