There is a lot wrong with the American system. In my life I have been a fierce critic of it. It's swamped with self-interest and big money. It accommodates and whitewashes staggering amounts of racism and prejudice of all kinds. Its foreign policies have often been monstrous.
But it still contains the mechanisms by which it can be made better.
Authoritarian systems do not have that capacity. That's their feature, not their bug.