This game is about trial and error and that is what is scary about it. Once you know how the mechanics of the monsters work, it becomes much less scary. You have a couple of options that aren't so bad.
one thing you can do is use the yellow Mailbox mechanic. place all the things that can be put into the inventory and start a new game with the gear you put in the mailbox.
I had a similar problem. I couldn't figure it out so I took all my stuff and threw it in the yellow mailbox out front and tried again while trying to avoid the triggers of that event until I am ready. Maybe it has to do with the number 66.6 and something about the time idk but my second playthrough hasn't had the event?
Small Hinty spoilers, there is a pipe in the vent in the work room that is slightly ajar. You can open by throwing some stuff at it. Just be careful when it drops ;)
The pipe has a slow attack speed, but does more damage.