This is a nice, sharp and clear photo. However, I think that it would have been quite a bit more effective if the main subject hadn't been so central in the frame and the flag hadd either been out of the frame entirely or appeared larger than it does from the POV from which you've taken the shot. A different choice of angle would have helped, I think.
Too much zoom, or too much cropping out of the original, or too much sharpening? This doesn't do mych for me - the composition, perhaps, as much as anything - too crowded together, and the negative space isn't well organised. Even with the flag there.