Both were noob with the powers they had so that's a piss poor excuse.
Are you serious?
Lmao, no naruto is a pro at chakra control no amount of bs can make up for your stupidity.
Naruto had chakra from them .. just chakra.
He can literally create his own jutsu from their chakra plus his to make any stupid rasengan he wants. Also coat too which is/was as useless as amaterasu.
Sasuke got a rinnegan .. meaning a new eye with an entirely new arsenal. There's no scan that shows that naruto struggled with all that chakra in the war.
The fox even admitted that they would of gotten blown away if it wasn't for even the extra sage chakra plus all the 10 tailed beasts such to match. Plus when naruto used his last rasengan the fox admitted that if he wasn't a noob he would of absorbed naruto's rasengan and ended him.
Sasuke literally checked matted Naruto like 3 times.
1. A the start, if he hadn't warned naruto that if he didn't get serious he would die.
2. Susanoo would of killed naruto if kishi didn't go for a foreshadow.
3. If the fox didn't add more sage mode on top of RSM power he already had would of died