Well in THAT case ...
It's hard to tell if the image is "too dark and contrasty". On my calibrated monitor, there is shadow detail everywhere except the central large structure shadow. I took the image into GIMP and played with it and didn't find a contrast/brightness that felt better. But the thing is, "too much" is a matter of taste. Some people like lower contrast. I find that flat and mostly uninteresting unless I'm doing something really atmospheric like a shot in the fog. So your own aesthetic matters most here. To my eye, at least, the one thing I would suggest is to bring up the highlights along the boundary line between the foreground and the base of the structures. That would provide some visual separation the eye might be drawn to.
Others have commented on the foreground. Here again, it's a matter of taste. If you composed up to provide more sky and less foreground, you get a better balance in the image, I think, but it's likely also kind of standard and boring (IMHO). A possible rethinking of this might be to work for this composition, but with the camera at ground level (tilting to hold everything in focus). that large foreground would then become a visual element drawing your eye into the subject. Again, there is no one way to do this and much depends on your own sense of composition. (The camera on the ground thing would also be interesting if shot closer to the main structures.)
How many photographers does it take to change a lightbulb?
25. One to do all the work, one to say you did a terrible job, and 23 to explain how they
could have done it better ...
