My friend keeps scooping when i cast Mesmeric Orb

My friend for the past couple of months has been saying that he's no longer allowing me to play Mesmeric Orb, the card is only there to help me mill myself. He has now being going on and saying its more powerful then Rhysic studies/smothering. I think this is crazy, like he himself runs artifact hate, but he hate that it mills him even if just a bit. Even tho one of friends runs an mill deck and he doesnt hate on that furthermore he run Edgar/Kaalia of the vast and Arabella as his current decks.

So, the question is: 1. should I just remove it because it's too powerful 2. is it more power then Rhysis or smothering