The thought that everyone should start at the same spot is dumb. Sure you can overthrow a king, but only if enough people support YOU. Not everyone immediately agrees with your right.
1st edit: Look, sure a king is buying his position, but it's a one-time thing. he doesn't forever be king. Take charge of a revolution if you don't like the king, because you can. Don't try to call this a P2W game just because nobody wants you to be king
2nd edit: This post has strayed too much, the point of caspian posting this is in my opinion to say one thing, and that is a disclaimer that i guess is very much needed.
YOU can do anything anybody else can do, you might start from different points but there is nothing but YOU stopping yourself from getting there. Sure a duke probably has a set up caravan that takes him resources from that one big place that he owns. But if you want it you can take it, and if you complain that he has more power and people then you are the one being dumb. You are saying that you and your group which in this situation is probably weaker than the dukes, deserves the ability to overcome the duke which has more stuff than you just because he started with more stuff than you.
I love this game because this game is many things, it is a political battlefield, a seemingly endless open world, and little developer structure players are forced to play in.
I can buy duke sure and have a duchy and not talk to anyone and maybe go be a duke in an NPC kingdom. there's nothing, however giving me people. I can't treat the NPCs or even the maybe small amount of PCs who randomly joined my duchy, like trash just because my power. i still have to persuade them to help me. That is the challenge of a title