If you could point to any authorities rejecting the Septuagint before Christ, that might count for something. However, it should be obvious that rabbis in AD 90 would be biased against the Septuagint by its clearly fulfilled prophesies of Jesus as the Christ-Messiah.
Sure, the Sadducees who were in charge of the Temple. They also rejected all books except the Five Books of Moses (the Torah). The Palestinian Jews had their own scriptures, the Samaritans their own Torah, the Alexandrian Jews their own, and the Essenes their own. Judaism was a heterodox community without a biblical canon agreed upon and the Pharisaical Masoretes did not hold monopoly on the Tanakh. They are the only surviving pre-Christian Jewish sect (unless you wish to unlocked the Samaritans as well).