Which has absolutely nothing to do with him "reacting and blocking with his left hand" but you are too triggered to have noticed that. :elmo:More like you don't actually know the definition of reaction, which doesn't surprise me with incorrect spelling and grammar. Since Naruto had responded with, '!' and follows up with, ''HIS LEFT EYE'' at the moment Sasuke teleported, this would be labelled as reaction or response. Whether he fails to physically block or dodge isn't relevant. He mentally responded to Amenotejikara, as Kaguya, Madara, Momoshiki and Shin all did. Naruto later curb-stomped Sasuke, despite having 9 Biju's on his side.
Sasuke haters are geniuses at making a joke out of themselves. :lol