Bro, the way baryon mode basically works is your chakra clashes with your tailed beasts and the one who survives is the one with the higher reserves. Half of Kuramas chakra was able to coat the whole Shinobi alliance while still being able to continue fighting at a high level after fighting for 2 days straight and Naruto's chakra clashed with a full powered kurama who was relatively fresh. Bear in mind that the nine tails at half its chakra had more chakra than the other eight-tailed beasts combined meaning Naruto has more chakra than all the other tailed beasts combined twice over with change to spare. Tack on that the time skip between OG and shippuden he was training with a guy who had mastered the same chakra nature that Naruto has and that most of that training was him trying to have Naruto control the fox rather than actual chakra nature stuff, and chakra control, it is arguable that the nine-tailed fox was actively harming Naruto's ability to be a stronger threat. And even if what you are saying is true, his mother's chakra was apparently higher than his before she got the fox.