Ted wasn't the only person Max had killed. He'd also murdered numerous Checkmate agents that tried to oppose him.For me, the problem with the premise of this story is the same as when they had Wonder Woman kill Max Lord. Your trying to bring real world logic into a system that simply does cannot accommodate it with any semblance of logic.
To expand - WW kills Max Lord because he controls Superman and is dangerous. If he is allowed to kill Superman, untold lives could be lost. It's too risky to let him live so - snap! Problem solved.
Okay, reasonable this actually seems to make sense.
Except, you are killing Max after he killed one person [Ted Kord] and could kill more. But the Joker, who HAS killed... what? Hundreds. Thousands now? That loon escapes from custory like clockwork and he gets to live? Not to mention three issues later Wonder Woman found Cheethah standing over the bodies of a dozen security officers and didn't kill her. Say what now?
This is what I mean. You apply real world logic to Max, but comic book logic to other characters simply because they are better sellers. The rules cannot accommodate real world logic without the whole system looking hypocritical and frankly ridiculous.
Now jump to Heroes in Crisis. Super beings with the power of gods suffering from PTSD? Reasonable, sure, based on all the crap they go through [especially lately when it has to suck to be a superhero] but for me it just doesn't hold up. People are nervous about putting a police officer with a gun back on the street in those circumstances, and these some of these guys are tank battalions on legs.
All this does is highlight the massively ridiculous premise on which comics have to rely for willing suspension of disbelief. And when its over, it will all be forgotten. Because it HAS TO BE for the comic 'reality' to survive.