Why is Arjuna so overrated?

Why is Arjuna so overrated? OVERRATED? Mahabharata starts with this sloka: नारायणं नमस्कृत्य नरं चैव नरोत्तमम् । देवीं सरस्वतीं व्यासं ततो जयमुदीरयेत् ।। Om ! Having bowed down to Narayana(Krishna) and Nara(Arjuna), the most exaltedmale being, and also to the goddess Saraswati, must the word Jaya be uttered. First sloka of the Mahabharata already shows the importance of Arjuna in Mahabharata. How can, the man, who is given respect and importance with Narayana himself, can be overrated? If there was no Arjuna, there would probably be no Bhagvad Gita! If there was no Arjuna, there would be no Draupadi since she was born to marry Arjuna! If there was no Arjuna, probably Karna would not be a very good warrior, since he aquired most of his knowledge to show himself better than Arjuna. If there was no Arjuna, Indraprasth would not be so powerful! Mahabharata is all about Krishnas: Sri Krishna, Arjuna, Draupadi and Krishna Dwapaniya Vyasa. Arjuna is the heart and Sri Krishna is soul of Mahabharata. I don't think I can imagine Mahabharata epic without Arjuna in it!