As promissed I am back here Adithya
An interesting creation here. Appeares like a view of a confused and restless mind seen through the window.
Why do you think square and rectangles are visually imbalanced ? Why do you think this one is visually balanced ? It is very interesting how our mind searches for a meaning in images which aren't very apparent (which makes the process of viewing interesting too)..
It is possible to create an image without a regular border. I think you need to try a different file format, not jpg, may be png/gif with transparent background would allow you to create them.