This could have been one of your finest images in terms of concept, abstraction and symbolization. If only you had taken this as a horizontal as well as a vertical. You limit meaning here by using a vertical frame, because you include only the door. If you had tried a horizontal frame, you might have been able to add context for meaning, by placing the door off to the right, and including a rough wall, furnishing, corner, or other aspects of local life off to the left of that door.
The door by itself works to a degree, but it is the interplay of subject and context that most likely leads to expression, Mo. By framing vertical subjects in vertical frames, you drastically limit expressive potential.
