Except that it's working as designed.
All nominally above board and proper according to rule-by-law and as since the first great purge of democracts from LegCo (the very reason for these by-elections), the pro-dems, despite representing clear majority of the population, will continue lacking even the power to veto bills.
Pro-democracy camp -2 seats (now total of 26), regime camp +2 seats (now 42).
I'll quote one response to Hemlock's take on this by-"election":
The pan-dems also must figure out a way to cooperate as a single entity to have any chance of countering the Untied Front's orchestrated approach and tactics of division. It won't be easy but they really must find a consensus across the various priorities.What the pan-dems need to do – and have generally failed to do in the past – is increase public awareness that livelihood issues are not something aside from the constitutional issues, as the government’s narrative would have it, but directly related to them. A system which gives undue weight to tycoons and special interests to preserve Beijing’s dominance is exactly what stands between us and affordable housing, a greener environment, decent pensions for the old instead of absurdly expensive white elephant infrastructure projects, and all the other things we so desperately need if Hong Kong is to remain livable for ordinary people.