I felt the central character would have more backbone and mounted a sterner defence of position when "interviewed".
Also as an Architect of the Cyber attack, I'd expected her to recognise it when subjected onto her Cyber environment.
I binged watched it over 2 evenings as I suspended my disbelief and went with narrative, also I was struck by the soundtrack similarity to "In Line of Duty".
It got its 4 stars because it pulled me in.
I felt that the cast characters were too stereotypical and a bit thick. I've worked professionally in this environment and the people who work in it, are significantly brighter and serious about the risks posed by security breaches than suggested by the characterisation and narrative.