What in the living fuck are u talking about ?
Akainu was literally stated in the fucking manga to having allowed
Aokiji to live after beating him down and crippling him to a point where he couldn't even stand.
Akainu is the only character in OP to continously severely injure all the oponnents he has faced in battle. The fact that you're taking a fodder like Curiel to prove your point shows what a creditless toxic poster you are.
The next time argue with facts if you have nothing to back your delusional thoughts up.
Akainu allowing Kuzan to live:
Turning WB into a corpse:
Nearly killing Luffy and Jinbe:
And he did all that in less than 30 chapters clown. BM and Kaido have both approximately 300 chapters of panel time or more, who tf did these two manage to severely wound huh?