The funny thing is that so much of it is based on the idea that everyone involved is going to be on their best behaviour, working for the good of the country, compromising with their opponents, and so-on. And, then it all falls apart as soon as one person realizes that they get an advantage as soon as they simply ignore the norms.

Also, don’t forget that there was less than a century between the revolution and the civil war. If your brand new form of government is so poor that a significant fraction of your population thinks a civil war is preferable to resolving things through that system, your system isn’t very good.