Nick767 wrote:I can connect the lcd screen to a lcd controller and the lcd controller to the raspberry pi and from the raspberry pi i can connect it to a stronger micro controller that can process all the power i need and more or connect it to arduino and connect it to mutiple other devices that can do what i want
You appear to have a different definition of "heavy programming" than I do. Yes, you can use a Pi to compile programs for an MCU. Yes, you can connect said MCU to the Pi and transfer the program. You can ssh into the Pi from a top of the line PC, too. None of that yields more processing power on the Pi.
FYI...the Pi is far more capable than any MCU you're going to find. The Pi is running an SoC.