Personally I prefer the Sims 4 graphics to Sims 3:
Like sure it's not as detailed, but it looks nicer.
The bushes, tree's, grass, road etc. all look much nicer which is better than looking "realistic" in a game that was supposed to be a cartoon game in the first place.
Also the house looks MUCH better and less boxy.
The original Sims was supposed to be a humorous cartoon game in which you controlled how your Sims live.
It was never supposed to be a realistic simulator.