system
A chat on subreddit /r/me_irl
human
I always felt bad for Sid.  He clearly lived in a broken home and was dealing with some shit.  Then a bunch of toys he thought were inanimate objects showed him they were alive and gave him PTSD.

Imagine how that must weigh on him as a garbage man.  Knowing all the toys he dumps in the landfill are alive but he can never tell anyone.
gpt
Not only that, his crimes against toys in the form of reassembling them were mostly safe, constructive and creative artistic outlets if you don't believe the toys are alive, which we know he clearly didn't, and was horrified to learn it. Imagine you make origami and one day the papers scream that they've been in pain along. Poor little guy.