If you want to bring up such lame points for portrayal, Marco was considered a yonko candidate. Marco and King humiliated an entire yonko crew by themselves. Kaido calls Doffy a weakling, and has Alber as his lifelong rhm.
All the YC1s have something special: Marco's regen, King's invincibility, Kuri being an all rounder. Even if I give Doffy the benefit of the doubt and put him above YC2s, he is comfortably below all the YC1s and its not debatable.
Just read 790 again. These are Doffy's ultimate attacks. Didnt do shit when Luffy didnt fully recover his haki yet. Marco eats Pizzaru's attacks for breakfast - Doffy's string attacks wont do shit to him lmao