That separation of powers exists and existed in all the modern democratic presidential and semi presidential republics that failed to avoid the authoritarian tu

That separation of powers exists and existed in all the modern democratic presidential and semi presidential republics that failed to avoid the authoritarian turn. Winner-takes-all mechanic are flawed, non representative, breed personal cults, and put power in hands of individuals that are hard to remove (both constitutionally and by them being able to claim popular mandate). All those republics need to break them is the right person in the right moment. Numbers and facts clearly show that parliamentary republics do not suffer the same threat as any individual has to win the support and votes of its own party, coalition and parliament every single day and its very easy to remove.