Here is my advice. Go in and be like hey, can we at least fix up X? (one part of disaster room). Then maybe mom will calm down. I will help you. Bit parts. Or, "how about we reorganize X area. let's do this." baby steps. Is he a hoarder? does he have issues? lots of kids with issues actually can't figure out how to organize/clean a room.
me 42 H 32 T 7yr M 6yr BD 5/2016 ILYBNILWY Separated 7/2016