That is slave mentality. This election proves that Hong Kong already has democracy under 1C2S otherwise the anti-establishment candidates wouldn't have been allowed to win. All Hong Kong residents should participate in elections, it is their civic duty as well as right, when everyone participates is the only way democracy can achieve fair results.
Do you really think the rioters would accept defeat? Before the election, the rioters at LIHKG and TG have already decided not to accept the result of the election if things didn't go in their way. And with their sophisticated propaganda and the support of the media, they would have succeeded. The election result just makes things easy for them.
If you think cyber bullying is bad, then you should take a look at the bullying by the rioters. Basically if you don't agree with them, they would find out who you are, where you work, where your wife work, where your parents work, and where your children go to schools and use every means they could to harass you and your family.
Actually these election results should not be too much of a surprise considering how the local government allowed the rioters to run rampant, failed to address underlying issues for many years as well as failed to deal with immediate issues, and the pro-establishment and pro-Beijing camps failed to rally their own public support both during the rioting before the elections and during the elections.
The Western narrative lumps together several different anti-establishment camps but these camps are independent of each other and not all support or excuse the rioters' bad behavior and they are also of varying degrees of being tolerant/hostile to Beijing's influence in Hong Kong and the CCP.
As long as the rioters get as fairly processed as possible through the legal system and don't get amnesty and there are no further violent activities (or the authorities somehow actually manage to curtail them) then there is no reason for the central Chinese government to interfere with either the PAP or the PLA.
But there is a long way to go to develop a competent local leadership as well as competent pro-Beijing camps.
All anti-establishment camps have vowed to never cut ties with the radicals no matter what they did. So even some of them don't agree with some of things that the rioters did don't matter because they would support the rioters no matter what.
I never advocate for the PLA or PAP but the central government might not have a choice if things go from bad to worse. HK government wants to cave and give the rioters amnesty but the central government refused to do so. This election would open the door for the HK government to request for amnesty and special committee to investigate the HKPF. Not sure what the central government would respond.