Because the MC is Fame while Zoro is Power.
Did you literally forget who the big daddy of roof piece was?
In case you need to be reminded, it was Zoro, not MC.
Every knockout and him being unable to continue is a separate round.
Start counting. And I counted 7 rounds last time you asked me.
Search function is your friend. If you think 5 or 7 rounds makes any difference to begin with.
Point is, he isnt getting 4 years of attempts against Kizaru. Zoro takes over.