Hong Kong was always going to happen because that was an agreed upon conclusion. China violated promises that it made (one country, two systems my ass), but Hong Kong was a part China. Taiwan has never been under the control of the current government of mainland China. At this point Taiwan would likely be a separate country if it didn't have China's dagger at its throat telling it that even a breath of declaring independence will result in immediate invasion.
What are you fucking talking about. Hong Kong has always been part of China. The imperialist monarchical tyranny of Great Britain forcibly occupied Hong Kong and separated it from Chinese governance on a temporary contractual basis. Once that contract was up, Hong Kong was once again part of China but instead of completely overturning everything in Hong Kong, the Chinese government established a way of working called "One Country, Two Systems" that is making the transition away from the dynastic monarchy of unapologetic genocidal racists easier for the people of Hong Kong.
The fact that the youth of Hong Kong decided to protest part of this process is a function of British propaganda. The protestors elders were not in support of the protests and some even threw their kids out of their homes for their participation. Meanwhile, the protesters in Hong Kong were incredibly violent for a prolonged period of time and the response from the Chinese government was incredibly sedate, patient, and considerate, especially compared to literally anything the USA has done domestically when people protest for the rights of black people.
Your narrative is fantastical with little to no basis in reality.
Colonialism seems to leave quite a mindfuck on local populations themselves. The young people I knew from Hong Kong (at the time since this was a long time ago) considered themselves British. Ethnically Chinese yeah but if you asked they were British. If the locals can be propagandized by invaders it's pretty easy to convince western zeitgeist that Hong Kong was anything but an occupied region of China.