Naruto did not surpass Jiraya until he learned Sage mode so stfu. The databook hasn't been updated since then, hence why Naruto is still on a 2 - Naruto hasn't even reached his prime yet, you're comparing early-mid shippuden Naruto to Jiraya and Minato lol. At least current Naruto can break out of any genjutsu thanks to Kurama helping him out, so that would boost his genjutsu stat by at least 0.5 or more. Yes Naruto was chunin level, he wasn't allowed to use Rasenshuriken because it damages his arm severely. He didn't improve in combat until he went to mount myboku at which point Kakashi still owned both him and Sakura at once.
You're the one who can't get off your high horse and think logically, Minato was gifted, once in a decade genius, surpassed Jiraya and the rest of the sannin, Jiraya. All of which have 3 or above in genjutsu. Oro has a 5, Anko has a 4, Shizune has a 4, Yamato has a 3.5, Part 1 Kabuto 4.5, Sai has a 3 Hidan has a 3, Sasori has 4... I could go on forever but my point is that none of the people I just mentioned have genjutsu feats, even fodders like Sai, Shizune, Anko, Hidan, even Genma has a 3. But according to you, The Fourth Hokage will only have a 2 XD.