King Sejong the Great

How to fill 86 episodes story? Shove a ridiculous amount of side stories while giving little to no attention to the story of the king! The king often felt like a side characters until he gets his moments every once in a while. These side stories were abysmal to follow through, they don't really contribute much to the drama and the characters involved in them usually disappear after that. Also, somehow they all had the same ending/conclusion, what even is the point?! This is the worst tale of a king I've seen, even when the king gets his moments it doesn't do a good job showing what made him a great king. Being soft and goodhearted isn't enough to convince us. It's mentioned in the synopsis that he invented Hangul, although that was the only interesting subplot but it didn't happen until the last few episodes. In contrast, the beginning of the drama with the king's childhood was the weakest and the worst part of the drama. The drama is extremely rough for what it had to offer.
What's up with killing off all the women?!