So you're mad that a Human Rights Organization is reporting on the details of Human Rights abuses Saudi Arabia has institutionalized to oppress women, showing exactly why the UN appointing Saudi Arabia is a terrible decision. It's a report on Saudi Arabia, not the UN.
The Guardian is a news outlet reporting on the UN Decision, it makes sense they report on the details of the UN proceedings, and quote Amnesty on the human rights violations.
What part of the Amnesty report is a half-truth? They are reporting on exactly what human rights abuses Saudi Arabia has committed and how. This is not a general news outlet like The Guardian or The Intercept. Amnesty reports on human rights. They don't report anything on without substantial evidence either.
Who are they vindicating here? It's certainly not Saudi Arabia, they talk about how they are guilty of oppressing women. It's not the UN either, they detail exactly how this decision goes against the UN charter.