@Kraslev I don't expect it to work for everyone, it does work for me and I think it can also work for others if the freezing in their game works similar to the way it does in mine. I've had the issue on two different computers and I know that what I suggested wouldn't work on one of them (where the freezes are short and frequent), I actually said as much. It does work on the other, where freezes are rare and big/obvious, if they happen at all. Besides, I tend to monitor my game quite closely anyway, so that may also be of influence.
Anyway, I tested my other save and was unable to replicate the actions I did before (because I really don't remember, I lost quite a bit of progress in that one). At a certain point, the game froze, under circumstances very similar to the freeze that occured previously. My Sim was again at the Hermit's house and tried to place her tent near the tree by the Hermit's house at around 10 or 11 PM. So I waited for the freeze to pass, was able to exit the game normally, then repaired the game and rebooted. I did one thing differently (aside from saving the game a couple times more) and that was place the tent in the same spot but during the day. Nothing happened, my Sim was able to go fishing, befriend the Hermit, eventually sleep in her tent, put her tent back in her inventory in the morning etc. etc. I don't know why the specific combination of placing a tent there at night causes a freeze, but changing things slightly kept the game running smoothly. I played a bit more and there were no freezes.
I did make a video, but forgot to switch on recording the UI in videos, so it's not particularly useful. I did make a backup of the save files involved (the original before the freeze and the autosave after the freeze) I can submit those if neccessary. I'll report back if anything interesting happens in my game.