Humiliation would involve digging up some dirt and exposing it in a comical way, hilariously highlighting a bad habit or something stupid the other guy does or says. Things Chael has tried to do. Conor just loudly interrupts his opponents while they're speaking during press conferences, saying things like, "YOU'LL DO FOOKIN NOTHING" or "Bum" but it's enough to spur on your average short fused MMA fighter. You can verbally smash people without being witty, clever, or original, and that's what Conor does. Comedians can "roast" people, Chael can roast people, Conor really cannot.
You have to understand the opponents and the audience. MMA fighters. Most of them fuck up every interview and press conference and can't say anything to make them stand out. Some of the least charismatic and slow-witted people on earth. And then sports fans... so yeah.
I know your retort already so no need to bother. Conor never "verbally smashed" any of my favorite fighters and I have no issue with him. I only take issue with mindless drones taking on Conor's persona and language for their own and giving credit where none is due.