Thank you everyone for your helpful input.
I know it's not my computer because it's less than 2 years old, has a SSD and 16gb Memory.
I know it's not the strays in Brindleton Bay because I use a mod from LittleMsSam that removes them.
Noooo...Please don't make me use windowed mode.... :#
I keep my household and sims inventories to a minimum of 5-10 objects.
Can't move anyone out because it's a 100 Baby/Bae/Vampire Challenge all rolled into one.
I had some minor lag before the last update but after the update it became unbearable.
I decided to move the household to a smaller lot in Brindleton Bay.
Cliffside Manor:
https://www.dropbox.com/s/iesuyn7z94zmg7g/2022-03-12_20-30-32.jpg?raw=1
After playing for a while and testing for lag I am happy to announce that my game is running smooth. I only getting a short lag when the kids leave and return home from school.
My guess is that it is a combination of the update, too many objects, and too large of a lot.
Thank you all so much for your help!