The magic of street photography is exactly the fact that you can't control the elements like you do in the studio. Unwanted background and foreground objects, blur, cropped parts, out of focus, weird perspectives and angles, hard and unflattering lighting, unnatural expressions, obstractive shadows, loss of details and so on and so forth. Many such images at first might look flawed but very often it takes just a bit of time to uncover unseen relationships between the various elements, creative and fresh viewpoints, surprising frozen moments and beautiful accidents. Unless you carefully choose every single part of the back/foreground, campaign for more aesthetically pleasing environments or use photoshop, your only other option is to learn to like what you now dislike.