Don't get me wrong. Legend of the Galactic Heroes is the single best show to watch if you want a serious discussion of sophisticated political philosophy. It's timeless, in a way, but too high-brow for the real 2019.
Our current global political situation is so ugly and ridiculous in practice, with even stupid politicans manipulating masses who should know better yet absolutely don't...the real world is chaotic, not neat and rational.
Legend of the Galactic Heroes has its democracy implode due to rampant corruption and incompetence. The only political system that ends up the winner is the benevolent dictatorship.