Naruto fades the heck out of his existence with a big rasengan before the poison comes out

The highest reaction speed of Boro you can cap at is from FKS V1 to FKS V2 Ay, both of whom are slower than KCM1 Naruto

Boro is not that strong tbh he got his ass kicked by team 7

Naruto probably wouldn’t realize the poison b4 it was too late