No worries. I gotta make this quick too since I gotta go to work in 20 minutes lmfao.
No it does not mean that it weakened his haki, rather his reactions. He couldn't dodge it.
I vaguely remember a databook, I believe
@Van has spoken of it before, that mentioned that the only thing impeded in WB's old age and in MF were his reactions.
You don't actually need haki to disturb a logia. Zoro did it to Enel when he cleaved him in half and stopped him. Regardless, we don't know if WB used haki then or not.
Same reason Sengoku or Doffy or Hancook or Ace or <insert any random character that was in MF who will show COC in the future> didn't. It was reserved for the MC. During the entire arc only the MC used it.
Imu or BB certainly. But I'll leave that aside for now, since BB is a character that grows exponentially and Imu is an unknown.
Say Shanks then. Kaido and Shanks had a scuffle that ended with Kaido hauling his ass back to Wano.
He has 7 confirmed Ls and 18 times being captured.
He took on the Yonko but we saw when the Yonko fight crewmates don't interfere
1. Shanks vs WB
2. Kaido vs Linlin
It's more than reasonable to assume one of those Ls came in a 1 on 1 fight. However, due to Kaido's nature of seeking battles and showing up in places all of a sudden, it's enough to entertain the idea that Kaido fights people a lot, and wins, but those people are not top tiers. People like the F6 which were captains before, SN, etc. That's why people bet on him in a 1 on 1 fight. Because most of those he wins, but more than likely because he fights opponents beneath his level. This last part is speculation, I'll admit that, but still valid.
This part was more of a generalization, not necessarily aimed towards you, rather the abundance of people who do it non stop.
EDIT: Apologies if I skipped something or won't reply in some time, I have to start work now