Sorry about your bad experiences with the game, I have seen other people's game crash when hiding under the bed but unfortunately after many attempts that has never happened to me so I dont know what is causing it to some people therefore I dont know how to fix it.
By kids, did you mean shadow figures? Hiding in the locker doesnt work with them, you need to stare at them constantly, they only move when you're not looking at them or you are hidden from them (in this case its the locker).
I apologize again for your bad experience, I recommend watching asmongold's walkthrough the game to understand how to get through the shadow people part of the game: