To backup whafrog I will make these observations. Episode 3 Obi-Wan and Anakin were both two great fighter pilots and they still got shot at and Obiwan got hit by a missile. In episode 4-6 you had some of the Best pilots in the galaxy in those space battles and many of them got killed. Han one of the Best pilots in a Episode 5 while trying to evade 3 star destroyers and a whole wing of TIE fighters still got hit by both to the point of losing his rear shields. Oh and those ties most of them were just bumbling minion pilots. So the argument that speed is a factor is moot otherwise how were 3 star destroyers that are slower than paint drying able to keep up with one of the fastest ship in the rebel fleet? Go through a list of the dead in those engagements you will find pilots who survived missions in TIE fighters to the point some were up for tie interceptor promotions before they joined the rebellion.
But the Death Star just a big slow moving target. Yep still 2 of them almost wiped out the Rebellion. Admittedly they had tie fighter help and the second one almost the entire Imperial fleet. Still wracked up kills on its own against highly skilled ace pilots. So speed and skill help but aren't the only factors in Star Wars universe.
If you need rl examples take a look at ww 2 fighter statistics. They were not great for the British and though America did help turn the tide we still lost a good many great pilots.
Edited by bull30548