Those 2 characters got stronger. The Luffy and Law that beat Doflamingo are vastly weaker than the ones in Wano.
And answer the question. Why was Jack able to survive a fight against an Admiral and Sengoku if he is so weak?
I think Ashura Douji gave him just as deep of wounds
Kaido doesn't know that they got stronger and he can't assume that they did. He isn't the reader.
Jack was disposed of defeated and covered in bandages. He was destroyed to a point the marines assumed he was dead, but he survived. So they destroyed his ass but he still came out alive.
Now you answer my question:
How does a FULL power Yonkou lose too two nerfed YC1s despite you claiming that a Yonkou equals more than one Admiral.
You're dodging this question the entire day and making the discussion about characters irrelevant for this chapter.