This is some "only in the US" level stuff (in the context of "The West").
You’re right. She starts with that
Misheard/didn’t pay enough attention. It’s about 4 months indeed
you can check reasoning for dismissal here https://business.gov.nl/running-your-business/staff/dismissi...
(Netherlands had a rule where you could have 3 fixed term contracts, up to 24 months total, before becoming a permanent employee)
so they could've hired her on a 6 months contract and simply not renew it :)
also, you can't be just fired for performance reasons right away -- you need to first do a documented improvement plan and you need to at least try to move the employee to a different part of the company.
if she was in the netherlands, she could easily sue CF for wrongful dismissal.