These mods although seemingly negative add a lot of realism to The Sims, hence its popularity amongst the community with almost 90,000 downloads on Mod the Sims.
Misery traits by NateTheL0ser add more versatile, negative traits. The following is a list of the best Sims 4 trait mods available currently, as always download mods at your discretion as they are not supported by Maxis and you may run into gameplay issues as a result.
You may also wish to back up your saved file before implementing mods to avoid save file corruption. When downloading CC and mods make sure it's from a reputable source.