Even the Americans, the State Department has (had?) people whose job is to help with nation building and they'd learned that if you copy-paste the US model you're basically just setting up a dictatorship in advance, the "President" will seize power, whoops.

It's impressive they got to forty odd Presidents with only one civil war so far, but it's just luck and it didn't last.

100% I have been raving about this for as long as I remember. Most folk nod, but say "it could never happen here".