Sasuke's power was meddled with throughout the show/manga.
Somehow, Sasuke cannot beat Gaara but was running circles around him in the exams.
Somehow, Sasuke refuses to use his Sharingan in a fight against four Sound Ninja, and his curse-mark is utterly useless.
Sasuke is somehow even to Naruto at the hospital, despite having trained for five years and receiving a good amount of taijutsu training from Kakashi while Naruto played pranks and just learned a random A-Rank jutsu from Jiraiya.
Sasuke is unable to kill Mei or Ay, despite having been able to seriously wound Itachi and whoop Team 7's ass by himself in combat.
Sasuke is somehow unable to best Naruto in combat despite Naruto having poor experience due to easily brushing off fights with unreasonably powerful attacks or being taken over by Kurama.
Naruto get's into tight situations that he shouldn't be able to survive all of the time, with the Nine-Tails being his excuse. Stop heavily sympathizing with the underdog and look at the facts. Naruto walks into a situation with full power, loses and unleashes a power that isn't his in order to win, while Sasuke's abilities are "forgotten" for the sake of making a spicier fight.