"Far superior" when we have direct on panels of them demonstrating that they were clashing for a few days straight and match the same output in attack speed and strength via Hakai. Whatever you have in your head of the "idea" of being far superior I guaranteed you are mixing other speed factors
Does this Qualify as Speed or Attack speed.
Again Kaidou vs Linlin was a very unserious fight to begin with. Yes Bigmom was fighting on equal terms doesn't mean she is relative to kaidou in attack speed.
They matched Attack power and Strength in that fight, they were more less static in the same place to begin with. Nothing about their clash screamed Attack speed.
[automerge]1769036442[/automerge]
There's AOE, which is also how Big Mom damages characters much faster than her physically. While Harald doesn't have homies he should have barrier haki like Garp's punches which can be difficult to dodge.
Whenever Oda can't justify something happening on panel he will just offpanel it. I doubt Harald is just speed blitzing Shanks and Gaban.
He doesn't need barrier Haki to cover huge AoE.
His normal attack either way covers huge AoE.