RootsChat.Com

Being somewhat new to this game, I was delighted to be able to find ancestors going back to BC on my heritage family tree. However when I seemed to be linked to everyone famous in history, it was clear it was not accurate and a lot of it was manufactured for more interest. I was always suspicious about one connection (Guillame arques) but it took ages to spot he was only 6 when he had a kid. So obvious but I missed it.
Any advice on what should be done now. Start all over again? It could be just one error or all of it