New Approach to Composition
Although photography is quite different from theater, your camera should work to act as somewhat of a “spotlight”. Use it to isolate a specific theme—a unique pattern—and minimize the details of everything else.
And now little more about how to use that "spotlight":
You are essentially following your camera’s “frame” guidelines and trying with all your might to fill this frame with what can be labeled a “beautiful” composition.
This is all wrong.
Instead, see the world around you and find exactly what you want to capture. Where do you want the four corners of the frame to be?
Once you’ve decided this, use your camera as what it is—a tool. Capture the image and visualize the exact aspect ratio. Although your camera may not create the aspect ratio you desire, a quick crop in any photo editor can fix this in seconds.