if you were within the 14-day window, Apple would accept a full-value return of your computer and apply the proceeds toward a different computer of your choosing. At this writing, all but the base model MacBook Pro 16-in models are seeing substantial delivery times, as they are being built-to order and parts are in short supply. Delivery windows are now around 25 April.
If you are past the 14-day window, your only recourse is to sell the Mac you have now and use the money to buy a computer that better meets your needs. A private sale might get a better price.