The Outers want out regardless.
They have no interest in making the EU work and have adopted a game-playing mentality in which winning is all that matters.
The challenge in the real world is to stay in and make the EU ever better. It will always be a work in progress and never perfect, but unless and until anyone on the Outer side shows a better alternative, it is best to remain in and press for progress.
Thanks to John Blackmore a member of one of our groups for letting us use this.