The game is a bit hard to navigate with how unintuitive the UI is, but is manageable. The loyalty system however, was hard to understand for me. The character that I managed to advance in capturing counties with did not have high demesne capacity, so I had to assign titles to relatives. However, they were quickly betraying me after several months, so I had to either assassinate them or revoke their titles. Thus, I was stuck at 15 demesnes, being attacked by kingdoms from far away, and constantly being betrayed by my own vassals. Maybe I will try the game again sometimes later, since the music is good, and playing the game in general is satisfying.
Edit: At 39 hours, I did manage to capture a sizeable number of counties, managed to keep my vassals in check with the loyalty value, and got to be the first in ranking by the year 1165, starting from 1066 with an army of 120 thousand men. Unfortunately, playing further does not seem to be fun, as it will be the same tedious process of capturing all the world bit by bit, which I don't want to do. I will count this as a complete game.