Saul

I'm in 1 Samuel now and my goodness a lot went on with Saul. Before he's appointed king he seems kind of lowly- from a small tribe. Not much pride. It talks about his heart and how it changed so he could prophesy. How he hides when Samuel wants to anoint him. How he doesn't brag to his uncle when he could.

Then he's appointed king and what happens?
First, some people grumble about it.
How does this make Saul feel? Some people taking an obvious dislike to him. 1 Samuel 10:27 says he kept silent, but it must have hurt.
In 1 Samuel 11 Saul brings unity to the battle and rescues the city of Jabesh.

The first problem with Saul shows up in 1 Samuel 13. The battle against the Philistines is not going well. The troops are "quaking with fear". Saul is waiting for Samuel, and waiting, and waiting. He waited 7 days and then he offers the burnt offering himself. Samuel arrives and rebukes him.

I feel for Saul here. He was in a bad situation. It's hard to be patient in a good situation, let alone in a situation where you are living in dirt and quaking with fear. God sets the bar high. You can do this. You can hang on. You can wait. You don't need to do it your way, you can wait and do it His way.

Saul also seems to make weird 'rules' that everybody has to follow, even though logically, they make no sense.

Later, Samuel gives Saul a mission to destroy the Amelkites and he does 95% but spares 5% or so. Now, to me 95% is an A. But it was not obedience to God's word.

22"Does the LORD delight in burnt offerings and sacrifices
as much as in obeying the voice of the LORD ?
To obey is better than sacrifice,
and to heed is better than the fat of rams.

23 For rebellion is like the sin of divination,
and arrogance like the evil of idolatry.
Because you have rejected the word of the LORD,
he has rejected you as king."

I haven't finished the whole story of Saul yet, but I recall he does some crazy stuff to David. What happened that led to this? Did he become prideful in being the new king? Was it a mental illness? Was his heart changed again? Is it because the king has so much more responsibility, so much more is required?