After Poe Dameron's insubordination during the battle above D'Qar, Leia demotes the impulsive pilot. By ignoring her orders to retreat, Poe endangered the fleet, and the Resistance lost all of their bombers while trying to back him up. After Leia is incapacitated during the attack on the Raddus, Poe seems surprised when Vice Admiral Amilyn Holdo is named the interim commander of the Resistance. Poe and Holdo soon butt heads when he demands to know her plan for escaping the First Order. Mistrusting the hot-headed pilot, Amilyn refuses to tell Poe any details and orders him to his post. Without consulting his superiors, Poe impulsively sends Finn and Rose on a risky mission with very little chance of success.
Later, Poe becomes convinced Holdo is preparing to abandon ship, and he initiates a small mutiny against her. Eventually, Leia recovers enough to shut Poe down and restore order to the ship. Unfortunately, Poe's actions led to the First Order discovering the Resistance's plan to use cloaked transports to escape to Crait. While failure was a major theme of The Last Jedi, it was extremely painful to watch Poe fail so badly and get so many people killed in the process. Additionally, the plan he hatched with Finn and Rose was ludicrous and not believable. Worse, after Leia's return, Poe is welcomed back into the fold immediately with apparently no consequences. All in all, this mediocre plot line could have been made a lot better with some script rewrites.