Do you? Brah, are you actually as dense as they say?
Law literally learned to negate dfs by observing Kaido and BM do it.
And when tf did i deny it?
That was something Yonkou's did something Passively due to their strong haki they avoided hax.
Law only understood his hax won't work on someone stronger than him. It's as easy as that.
He didn't learn anything else. Tf did he learn from Smoker? Doffy? Vergo? Hawkins? Blackbeard. Cope is straight up insane.
Law doesn't even have strong Haki , Go look at the chapter again , it says " intensity " of haki not strong Haki. Law had to put an effort to minimize already being affected by DoC Q.
Yonkou's were doing it effortlessly.
Sky split? All forms of Haki is copium to no end.