I have no love for the CCP but I think this type of caricature simplification is both wrong and not insightful. The CCP members are not some cartoon villains bent on world domination.

The British did not allowed them to choose either. The members of legislative created by the British is based on appointment not elections. The British only decided the reform the legislative after the handover sealed.

The CCP prevented the British from enacting democratic reforms and any self-determination in Hong Kong, under the thread of military invasion. This isn't on Britain, they tried decades prior.