I want to know that how can i make a better game than sims4 ?

I played many games but none of them were soo good, but then i found sims4 and i'm playing it from last 1 year andi also want to know how can i make a better game than this with some more functions and updates. I found a website which tell everything about sims4, check it out and tell me how can i make a good game like this.