Avengers touched on it a bit, not as much as maybe they should have, but there was a scene where an entire building came down and one of the people who lost family in it confronted them.

(I thought I replied, but it seems to not be here, not sure if I forgot to hit Reply or what but trying this again)

Sadly not really.
Sometimes aftermath is used as a plot device- for example the Avengers series dealt with that a bit and who should be responsible for the actions of superheroes.

But for real 'full picture' it's almost never shown because it's messy and bloody and awful and really really sad. Think opening scene of 'Saving Private Ryan' just with a lot more feels. If those cars weren't blacked out you'd see blood everywhere and the people in them would be either wounded and screaming or gasping for air as their lungs fill with blood or dead and mangled as bullets tore their bodies apart. And if anyone else was in the back seat and survived you'd have the terrified screams of a child who just watched as Mommy get turned into so much hamburger meat and then the driverless car crashed. And then, perhaps hours or days later, you'd have families that break down in panicked screaming-cries when they are told their wife/husband/mother/father/son/daughter is never coming home.
Ask any of THOSE people, and any of them would happily trade Joker's life to get their loved one back.
The REALITY of serious violence can't be shown in PG-13 movies and even R movies either can't or don't often show it. People go to the movies to have fun and feel good, not see a bloody mess that makes them want to puke and then cry as they experience the pain of a broken family.

Perhaps this bothers me more than most because I HAVE seen what the real result is like. I was around for the shock video era in the 2000s and saw some really awful stuff from Chechnya. There's a bunch of combat footage coming from Ukraine. And closer to this subject, I've seen a lot of videos of defensive shooting incidents. It's not like movies, it's not fun. It's just brutal and sad.

The boys?

Yeah when Batman sees killing Joker as just as bad as him murdering random Innocent civilians of Gotham, he's stupid.

Same for Two Face and Scarecrow and all the others. Batman by leaving people to escape jail and murder more each time is not helping Gotham.

I can understand Batman and his motivations, but I think he has blood on his hands, and not just from the crooks he leaves with crippling medical debt.

I am blaming Batman for his choice and for his reasoning.
He pulls the trigger, Joker (a psycho who's killed dozens/hundreds already and will kill even more) dies.
He doesn't pull the trigger, 3-4 innocent people die now and Joker goes on to kill scores more.

I argue Batman can't just wash his hands of responsibility because he CHOSE to put himself in that position. He decided to be the one with a motorcycle cannon pointed at Joker's face. If he didn't want to be responsible for life and death, he should have stayed home and gotten a massage. But no, he chose to be the city's defender, so there he is.

Perhaps it helps to drop the movie and pick another analogy. Imagine there's a mass shooter psycho walking around shooting children, and there's a police officer with weapon drawn and pointed at the psycho. Police officer decides not to shoot the psycho because his conscience says he doesn't want to kill anybody. And because he doesn't take the shot, the psycho kills 3-4 more kids.
Do you argue the officer is blameless for those childrens' deaths?

But Batman is ok with killing the henchmen of joker and other villains by dozens