Sims 4 Sims get stuck in an animation loop runs very slowly

@kristengee123  The article on Crinrict's website describes your various options.  But in summary:

• Put aside your save until EA has a fix
• Revert to a previous save from before the issue occurred, and either cancel Winterfest or remove Father Winter as a tradition
• Revert to a previous save, and use one mod to prevent the issue
• Use two mods to fix an existing save

In your case, you could delete the bloated save, then delete the .ver0 extension from the save listed immediately below it, and the data from the second to last time you saved would now be your active save.  So you could play forward from there with either the mod fix or with Father Winter removed.  More details, and links to both relevant mods, are in Crin's article.