Sometimes when there were many problems in some project, all you need to do is to go back to the beginning, trying to start it again and do it perfectly.
If this is your situation, you can use the expression “Go back to the drawing board” especially when you want to scrap all your previous plans and ideas.
Let’s see some examples :
– There’s nothing you can fix now, just go back to the drawing board and try things differently.
– I went back to the drawing board to find where I went wrong.