So so simple, yet they made it more than what it was since they lack the knowledge on the sharingan good or bad. Minato wins, simple as that.-Amaterasu and Enton can deal with Kunai, but Minato only needs at least one to reach Sasuke's general position and he can throw more than Sasuke can destroy at once with Amaterasu and Enton. Not to mention they won't be destroyed instantly so he still has a short time frame to teleport even if Sasuke manages to engulf any Kunai in flame right before it hits him.
-Minato can throw Kunai from multiple angles using a clone.
-People keep mentioning Sasuke's reaction speed but they fail to realize that Sasuke's reaction speed isn't special without the Sharingan. Minato can attack from the back outside of Sasuke's line of sight, thus Sharingan won't help him react faster, meaning it's basically a base Sasuke's reactions vs. Minato's Hiraishin blitz, and that's a battle Sasuke loses.
Minato tosses a few Kunai at him, uses Hiraishin V2 and one shots w/ Rasengan. Amaterasu is dodged. Genjutsu never happens due to avoiding eye contact and teleportation. Enton never hits.
Off topic: Ppl still think Juubito's flying speed is his shunshin speed? lmmfao I'm out!