You went from "the facts supported the reason" to "we don't have all the facts necessary to know if the facts supported the reason." to "from the facts we know, the reason seems sus."
If she's doing all the things she should do ( as she mentions), but lacks technical knowledge for a technical product.
Than if she asks feedback, she'll get points for the effort.
But concerning technical knowledge, there's not much to do in a short period to get an employee profitable in a lot of cases. Definitely with a product like Cloudflare.
And saying you lack basic knowledge, is very hard to do/fix. Because the knowledge is not solely Cloudflare related. It's development, website, networking, ... There's a difficult gray area on what training someone needs for technical things.
Even if the employee is motivated. They won't be profitable within a year.
They gave a reason: performance and the girl mentioned to have 0 sales + 3 opportunities.
I wouldn't bet a penny on that lawsuit to win.