Jesus argued that he was not blaspheming by calling himself Son of God because God the Father set him aside to judge. He did not bring it upon himself or appoint himself. One greater than him, the actual Most High God (Elyown), made him godlike (Elohim). So he is less than this Most High God, even if he could be called a god (Elohim) or “O God” (Elohim).
