The problem is not the absence of a Palestinian state, but Zionism itself.
What is the use of a Palestinian state, if Zionism, as a racist, exclusivist ideology continues to define Israel, and impose that definition on the Palestinians?
This ideology calls for racial purity of Jews in Palestine, of course, at the expense of the native inhabitants of the land. To achieve this, millions of Palestinians had to be forced into exile, hundreds of thousands needed to be killed, wounded or incarcerated.
Neither two states, nor even one state is possible if Zionism is not entirely defeated - not revamped, not ‘fixed’, but eradicated.