Maximizing Windows Sucks on Mac

So today I wanted to make my window fill the entire screen. The only problem is when you click maximize on a mac the window resizes itself to pretty much any size other than taking up the whole screen. The only way to do it is to use your mouse to manually resize the window. But even then it sometimes moves itself down, then the bottom of your window is cut off. Resizing windows manually is a waste of consciousness.