@simm621 I have this happening in my game too! & yeah, it's rough when deaths are constantly happening. My Sims' enemy just died and she got hit with a 2 day moodlet.
For me....I love the concept....as I wanted my Sims to react more, so I applaud the Devs for bringing this feature. But I hope they tweak it to where it makes sense. If my Sim is enemies with a NPC....they shouldn't be sad. Same with Sims they barely know.
I've never used the UI Cheats extension...but if this doesn't get fixed I might be getting the mod to get rid of the moodlet. & in the 100 Baby Challenge....having complete sadness 24/7....yeah I feel your pain.