Are you an idiotic clown?
Imagine thinking that the Admirals don't have CoC, despite both Sengoku and Garp having it, along with many other characters.
Yes Kuzan was mistreated, it's not like he held back a bit, oh and Kuzan still defeated Garp at the end.
Imagine comparing Xebec to a Yonko, are you dense? Xebec is not anywhere on the same level as a Yonko, in fact the whole Yonko system didn't even exist yet.
Next time stop being an ignorant tard.