UK offered a rather simple pathway to immigrating to the UK for most Hong Kong residents [1]. But the choice between the stagnant UK and the booming mainland China was not obvious for everyone in late the 1990s, when China seemed to be democratizing more and more (despite the Tiananmen massacre), and growing richer by the day.

[1]: https://en.wikipedia.org/wiki/British_National_(Overseas)

I know that attributing to western countries the responsability for any bad thing happening in this world is a common reflex, but we are 30 years after the handover, 40 years after the negotiation, so surely China bears some if not pretty much all the responsibility here.

And it's not like the UK had much of a choice in the first place. China threatened to invade and there is very little the UK could have done to prevent a full control.

Worth also remembering that "one country, two systems" came with an expiration date that is rapidly approaching anyway.

> Britain had the chance to liberalize Hong Kong before the handover

How would it have made a difference when the Chinese military invaded?

TBH UK never had the chance because PRC saw through their games. TLDR UK wanted to maintain influence post handover for their investments, but like most other colonies on the fading empire they had no leverage, i.e. negotiate to turn HK into self administered territory (like Singapore)... along with UN decolonization rules meant engineering pathway for HK independence. PRC keked and said fuck off and promptly removed HK from UN list of non-self governing territories. There's a reason UK/Patton had to jam in HK liberalisation efforts last minute to increase UK influence post handover and not before... because if they did it before, i.e. pre 90s there would be so much anti colonial and pro CCP sympathies that political freedom in HK could be contrary to British interests. HK was just another Suez, symptom of UK weakness, not any one man.