In two chapters Saul loses the support of the most respected man in Israel, Samuel, loses the support of his army as he begins losing battles, and loses the support of his son. By the end of chapter 14, his people have no regard for him what-so-ever.
Chapter 14 concludes a campaign against the Philistines. Saul, after losing a battle already, has withdrawn to higher ground while much of his army has fled and is hiding in the hills. His son, Jonathan, decides to take his armor bearer and head to the Philistine camp by himself. Long story short, his son attacks the camp, throws the Philistines into a panic, and brings a victory out of what should have been a clear defeat. The problem is Saul makes a bad call as the supreme general. He refuses to allow his troops to eat. Jonathan doesn't know about this order, however, and eats anyway. Later, Saul orders for his son to be killed for disobeying orders. The troops' response is telling.
"Shall Jonathan die,who has accomplished this great victory in Israel?"
When I read that verse, what I hear is, "You want to kill Jonathan...who do you think accomplished this great victory, anyway? Are you nuts?" The answer being...yes. From this point forward Saul continues to make poor decisions, eventually losing his mind to jealousy and paranoia. Israel wanted a king, and they got one, but I'm guessing they realized after the fact that having a king wasn't everything it was cracked up to be.
Stopping point: I Samuel 14