I know the original post is a few years old now, and I'm not sure whether this has been said or not, but you don't need to disable the lot completely. There IS a cheat for removing a single sentiment, both the positive and negative. I had to do this recently as a sentiment was gained that was a glitch and was completely inappropriate. Anyway, the cheats are as follows:
1. Open up the cheat console (CTRL + Shift + C on PC / L1+R1+L2+R2 on Consoles)
2. Make sure you’ve enabled testingcheats true
3. Type in modifyrelationship firstname lastname firstname2 lastname2 100 (the firstname lastname instances should be replaced with actual Sims names of who you want the Sentiments to be applied to, and after 100 it should be from the list below)
4. Paste the Sentiments cheat code from the list below
To add a sentiment, it's 100, to remove a sentiment, it's -100. For example, it should look something like this: modifyrelationship raj rasoya geeta rasoya 100 sentimentTrack_Adoring_LT_lifesaver
– sentimentTrack_Adoring_LT_lifesaver
– Awed by Lifesaving Hero
– This Sim was saved from the clutches of death by another Sim.
– sentimentTrack_Adoring_ST_generic
– Adoring
– This Sim wants the best for another and thinks they’re so wonderful!
– sentimentTrack_Adoring_ST_impressed
– Impressed
– Impressed by the other sim
– sentimentTrack_Bitter_LT_cheating
– Betrayed by Cheating
– sentimentTrack_Bitter_LT_grudge
– Festering Grudge
– sentimentTrack_Bitter_ST_breakup
– Bitter about Breakup
– sentimentTrack_Bitter_ST_divorce
– Resentful about Divorce
– sentimentTrack_Bitter_ST_fight
– Grudging after a Fight
– sentimentTrack_Close_LT_generic
– Deeply Connected
– sentimentTrack_Close_ST_adoption
– Open-Hearted
– sentimentTrack_Close_ST_generic
– Closer from Happy Memories
– sentimentTrack_Close_ST_nearDeath
– Close after a Close Call
– sentimentTrack_Close_ST_party
– Closer after a Fun Party
– sentimentTrack_Close_ST_qualityTime
– Growing Closer from Quality Time
– sentimentTrack_Enamored_LT_generic
– Deeply in Love
– sentimentTrack_Enamored_ST_generic
– Smitten
– sentimentTrack_Furious_ST_cheating
– Furious about Cheating
– sentimentTrack_Furious_ST_generic
– Furious
– sentimentTrack_Furious_ST_wedding
– Infuriated about Cancelled Wedding
– sentimentTrack_Guilty_ST_awkwardDate
– Awkward after a Bad Date
– sentimentTrack_Guilty_ST_badParty
– Ashamed of a Terrible Party
– sentimentTrack_Guilty_ST_generic
– Guilty
– sentimentTrack_Hurt_LT_generic
– Deeply Wounded
– sentimentTrack_Hurt_ST_generic
– Hurt
– sentimentTrack_Hurt_ST_rejection
– Dejected about Rejection
– sentimentTrack_Hurt_ST_romantic
– Heartbroken
– sentimentTrack_Hurt_ST_saddened
– Saddened