Where is the center of the universe?

No.11060331 ViewReplyOriginalReport
I was wondering.

If there was a big bang...

If the universe is expanding...

Then the universe is expanding from a central point, the original location of the singularity.

If so, why can't we look at the cosmos, look at the direction galaxies are moving, and backtrack their vectors to determine where the original center of the universe must have been?