This seems unfair to Mon Mothma because though she is kind of a shit lib she is also sending large amounts of money to the space Viet Cong

In the new canon Mon Mothma’s defining act as the first chancellor of the New Republic is to disarm the Galactic Military in the face of an obviously bellicose imperial remnant (who totally promises they aren’t interested in reconquering the galaxy), and then she promptly retires. This leads to individual systems militarizing themselves and then pledging support to the First Order, who easily destroy the New Republic at the first opportunity.

It almost seems like political satire, but no, it is just a hasty post hoc rationalization for returning to the A New Hope status quo.