Wherever you look far away, you look at light that traveled some long time, at the speed of light, before reaching your eye. Their is a cosmic microwave background from that epoch. It's like a big sphere the size of the universe. And you know what? It's centered on you! Because whenever you are, you look at the universe as it was when it became transparent.
So what kind of question "Where is the center" is ? It has no meaning.
For any human perspective, the center sure is on Earth. 80% of the population is probably wrong.