So effectively, you will never fly CX again because they enforce their well-publicised lounge access rules whilst you would have liked them to be suspended for you, and because someone selected a free seat while you took the gamble of selecting window and aisle hoping that you would unilaterally "privatise" a third seat which you did not pay for?

I sympathise with your disappointment and suggest that you stop flying altogether (you might consider an exception for private jets or buying your own airline so long as you don't mind the crew serving you macadamia nuts in a bag) as no airline I know of would conform to your exacting standards of letting the passengers write their own rules.