I would too. Perfect characters are simply not relatable. Yes, they can be "awesome" but in the end, they do little for me.
Even Yang has his flaws, and I'm talking about as a leader, not a person (though there's flaws there too, quite adorable ones in fact xD) His idealism is what got him killed, if he had for once, taken power into his own hands, he would have perhaps survived. It was upon Dickhead's orders (the dude from El Facil) that made him open the doors.
It's quite a shame, when it comes to Wenli, if it weren't for Democracy he could have lived the rest of his days under relative peace under the Empire. Reinhard was by no means, a cruel man, and treated him with the utmost respect.
But since I'm quite biased with Wenli, are there any other flaws you could point out?
And yes, like I've said before, I've never seen a balance of morality and political philosiphy done so well outside LOTGH. If you ever find that, please tell me because I've love to watch/read it.