Re: Add and remove sentiments
@jentasticC although you unchecked the lifestyles in game options. The sentiments between your Sims will still exist.
In the situation you desrcibe there could well be a trait incompatibility between the single Sim mother and her toddler or a trait in your toddler that can trigger an angry mode. When your toddler has a mean streak trait or the independend one. I can only advise to let your toddler take their own food. You can fill the inventory of your toddler with left overs so they can take and eat it themselves.
On the other hand this reaction could also be related to one of the mods you have been using. As you stated in your post you deleted the cc and mods. But did you also delete the 'localthumbcache.package' file from the Documents\Electronic Arts\The Sims 4 folder. There could be a residu of these mods still active in the save you are using.
Please also check these options.
Have fun playing. 😉