alright
the crying kid is Cory Saladson
his dad is Christopher Saladson
Christopher didn't get the kid he wanted (he got Cory instead of whatever he expected) and went from short-tempered to constantly insane
this is a depiction of a few weeks before Cory ran away from home
those little ghosts are culminations of Cory's doubt and anxiety, laughing at him as he's being yelled at