Agreed , but a huge factor played a part in that ending result , which cannot be logically ignored.
Neji was caught off guard due to Naruto's sudden last minute increase of speed caused from a large increase of chakra , this led to Neji starting rotation late , resulting in him not building up enough momentum to fully stabilize a full spinning dome , which when ran into by Naruto's Kurama Chakra , the repeling force back-fired , resulting in both getting repeled.
A full spinning Kaiten would repel Naruto without backlash.