So, the unbiased spoiler is:
A) A Boro breath is enough to damage a admiral. Kaido's Boro breath didn't manage to hurt anyone besides himself.
B) A admiral needed to get serious to fight a 8yo without combat experience and got scared of just sensing shanks.
Those new admirals suck ass. Fujitora is incapable of doing a single thing right and makes others worse (with him sengoku lost 2 ships to fucking JACK, Doffly lost dressrosa, Greenbul let Sabo go), and now this Aramaki is just someone that sucker punched King and Queen while they are still recovering and is unable to handle Momo 1x1 without getting serious.
I miss the old admirals. They are forces of nature and still impressive almost 20 years later. Oda should have used his original ideas for new admirals instead of those frauds.