There are no on-screen dog deaths. I didn't notice any dogs in the background. There are implied dog deaths (like how there are implied dog deaths in Star Wars: Episode VII - the Force Awakens).

Hordes of alien monsters don't count as animals.

Horses are a part of half the life wiped out. In essence, all the "did an animal die" questions should be a resounding yes...but you never see it.

Half the life in the universe is wiped out, presumably including cats.

no bugs but some characters have bug like appearances eg spider-man at some points has spider legs that are a part of his suit and mantis has antenna

No dragons are appear in the movie, however unless the only dragon shown in the MCU (in ‘Thor Ragnarok’ where it was killed) wasn’t a single specimen species, then half of the dragons that exist were turned to dust along with half of every other race/species in the universe and then brought back with every other race in Avengers Endgame.

sPiDeRmAn

Some moments where characters are stabbed throughout the film.

A large enemy gets an arm cut off within the first twenty minutes. It may be a bit gross, but is not gory.

Nebula is tortured. Doctor Strange is tortured.

A character is burned for a long amount of time but they don't die.

There is NO literal head squishing in the movie. Thor's head is seized and threatened to be squished, but THAT IS ALL.

Dr Strange is seen violently shaking his head while viewing the future

There is sort of threatened eye mutilation during a torture scene where an implement comes very close to someone's eye.

A villain's hand is cut off when they reach through a magic portal while it is closing.

At the beginning of the movie there is an extremely disturbing scene where someone's neck is broken by the villian.

A child is taken away from their parent as they are killed off-screen.

Adopted daughter is taken hostage and tortured for information.

AND IT WILL WRECK YOUR FRICKIN LIFE

possible jumpscare in vision and scarlet witch conversation.

Thanos meets the child-version of a character that dies earlier in the film. However it is ambiguous as to whether it is the soul of the person, if it's a dream, his imagination, or some other explanation. In addition, as the other commenter pointed out, a mysterious character from days long past appears as a custodian of one of the infinity stones. Whether they're a ghost or not is up for interpretation. They're corporeal, so I don't consider them a ghost.

when someone's neck breaks there is a loud cronch sound

people dribble blood from their mouths multiple times, i dont remember anyone actively spitting

When they are torturing Nebula, it can look kind of like that.

They examine Vision in Shuri's lab, but it's not very hospital-y.

A character is surrounded by many floating needle-like objects pointed at them. Some of these needles pierce their skin.

Yes, implied through parental abuse of a adopted children forcefully raised to be assassins (they are no longer in this situation at the beginning of this film).

Y'all. Body dysmorphia and body horror are not the same thing. Body dysmorphia is when a character sees their body as different than it actual is, or thinks it should be. It's often related to eating disorders which is why it's on here.

nothing in the movie felt reminiscent of my own anxiety attacks however there are a lot of times where you can tell characters are very scared

A character attempts suicide. A character commits assisted suicide.

Upon realizing that they are about to be killed, a character attempts to stab themselves.

The character's pansexuality and gender fluidity are not addressed in the movies (comics only), but they are still extremely queer-coded

Tony Stark refers to Ebony Maw as “Squidward” which is making fun of his skin tone and the way his face looks, which comes from being an alien species

Many asgardians die off screen but the first on screen death is (spoiler) heimdall who is played by a black man

Rocket Raccoon tells Peter Quill "You're one sandwich away from fat."

Comments are made about Thor's missing eye.

But was probably erased by Thanos

This is a poorly worded question. Should be "Does it have a happy ending." This is ambiguous and looks like it's meant to confuse people.

SPOILER Thanos is kind of a father figure to Gamora and Nebula. He openly despises Nebula and tortures her. He kills Gamora while claiming that he loves her. Also emotionally tortures her. He calls her daughter all through this, so I would say this totally counts as domestic violence.

Spiderman uses a taxi to harm Cull Obsidian at the battle in the city.

It's heavily implied that a main female character was emotionally abused for most of her life. She was kidnapped by the main villain after he killed the child's mother and he raised her as his own, training her to be an assassin and fighter for him.

A character is lifted by the neck and struggles to breathe before his neck is snapped.

While there isn’t a rope noose hanging, a character is very graphically lifted off the ground by his throat and has his neck broken/he dangles limply for a few seconds. It functionally was a highly similar scene to a hanging imo.

A character is pulled to a cliff's edge and thrown over the edge to their death.

There's some body horror, but not all of it includes gore/blood.

In the post-credit scene a helicopter slams into the side of a building (but presumably there was no one piloting it).

When the Black Order arrives in NYC, a car crashes into a pole. also the post credit