The most important position on a football field is the quarterback. A bad team with a good QB is going to be decent. A good team with a bad QB is not going to be successful.
But there are ways to help make your QB look good. The best way is to have a good offensive line. A good OL will cover up a lot of problems at QB: many QBs struggle under pressure, but a good OL can prevent pressure. A good running game makes a QB’s job easier, but a good running game requires a good OL.