This is really depressing. The system seems to be designed to be strong but not infallible, with the assumptions that the people trusted to run the government would do so competently with the best interests of the nation. It seems clear that a slow process of radicalization has replaced the interests of the nation with the interests of the party and it's unclear how to fix it.

If one group defects to block voting and no compromise the other side has to also defect or be run over. This is the prisoner's dilemma writ large, only we citizens are the ones paying the penalty for dual defection.