I mean Aokiji and the adimirals all get underestimated constantly compared to Yonko and Commanders so they're all in the boat there. Plus you're not giving Aokiji any credit considering he tricked white beard into stabbing him so he could counter his spear and almost stabbed white beard with his Ice Partisan until Juzo came in and blocked it, used his Ice powers to freeze all the boats so they couldn't escape, and was being a general nuisance. I honestly think they were about ballpark Akainu just got the brunt of White Beard's Anger so White Beard wasn't holding back against Akainu so he took significantly more damage than the other two admirals.