Left him scarred for life, to the point his scar hurts by just hearing Akainu's name.
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LOL. That's wrong. I have no idea why you guys don't read manga, instead you guys are reading Admiral fan arguments and gets affected by it.
Luffy heard Akainu's name before his wounds hurts, in right here;
--- Chapter 650, page 04.
And his scar didn't hurt.
Why Luffy reacts like that? Because Luffy cares about Aokiji, Aokiji sparred Luffy's life before, and he just learned that
Akainu defeated Aokiji in a death match, and thought that Aokiji possibly died because of Akainu.
As you can see, Luffy is interested about this fight between Aokiji and Akainu, because he would obviously wanted Aokiji beat Akainu.
--- Chapter 650, page 05
Then Luffy's scar hurts, because
he learns Akainu defeated Aokiji.
--- Chapter 650, page 06
Thus in the next page, Luffy asks ''did Aokiji die?''
The reason why Luffy's scar hurts is because he is worried for Aokiji, not because of simply hearing Akainu's name, he already heard it at the beginning, and his scar didn't hurt.
Killed his brother in front of him and caused him the worst existential crisis he has ever suffered.
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I don't see what's the point of this, fodder marine executioners could kill Ace. But if you are saying Akainu got lucky that Ace decided to be a moron and didn't run, and he didn't die at the execution platform instead, maybe...
Still we can't ignore the fact that Ace's idiocy and his refusal to escape get him killed, its not like Akainu with his incredible skills managed to cornered Ace in the war, Ace simply got baited because he was an idiot.
Annihilated without following actual orders Robin's people.
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Well this is the reason why Aokiji also hates this guy, and many marines hates Akainu as well, this should be an internal problem for the good guy marines, I don't see how Akainu getting his ass beaten by a PIRATE, would solve this problem.
The marines should handle this, which is why Aokiji wanted to solve this problem, but he failed. I don't think Oda will change this, either way, Akainu should be declared as guilty for his crimes, and a criminal pirate beating his ass won't change this, infact it would make things even worse because that could create
sympathy for Akainu inside of the marines
''oh poor Akainu, he gets bullied by a filthy pirate, we, the noble marines, should protect and help our fleet Admiral and save him from the filthy pirates!'' kind of thing, Akainu will only get more
sympathy inside of the marines, if Luffy or any other pirate bullies Akainu, a marine like Aokiji should solve the problem that's called Akainu, who is the no.1 dog of the World Government and Imu.
Let's not pretend he wouldn't care when he clearly cared when Jinbe mentioned him.
He only cared because it was related to Aokiji as I explained above.