Game lag

The game is basically unplayable. Last week it blue screened on create-a-sim, then I restarted the app and I could barely use it at all and had to force shutdown. I have repaired the EA App, and repaired Sims twice now and I don't know what to do. I've deleted so many households in case that was the issue, and it has improved but the game is still on a lag and for some reason the floor is not there/shining white instead of loading?