>>281749093
Luffy hasn't won a fair 1v1 against a main arc villain since Hody Jones.
>Punk Hazard
Luffy got choked out by Caesar and had to be rescued.
>Dressrosa
Sabo had to buy him time so his G4 could recover against Doffy.
>Whole Cake Island
Luffy had to flee and hold the mirror lady hostage to recover his G4 against Katakuri. He also needed help against the first guy he fought early in the arc.
>Wano
Zoro and several others helped him against Kaido.
>Egghead
Kizaru could have killed him but brought him food.

So to answer your question, Luffy will probably never be strong enough and will have to have help.