I meant between the actual institutions of government, but you raise a good point.
I think that proportional representation is worse. Let's say you have the following election split: 45% Conservative, 45% Socialist, 10% Green. In such a scenario, the Green Party becomes king-maker and wields enormous power nearly equal to whoever it chooses as coalition partner and highly disproportionate to its tiny share of the vote.
I'd point out that this video is basically "The Dictator's Handbook" in a nutshell video form. And that book is far from universally accepted, so while the video is presented in a very assertive tone you might want to take it with a grain of salt.
AI and data are the new oil, so beware folks - when the peasant workers are no more needed, you may want to watch out for the dictators trying to take over the ship.
This is the design goal of the US Constitution, from the federal nature of the system to the gridlock-by-design of the central government.