I think you did well capturing a different perspective of HK. I do agree the vegetation in the foreground is distracting and being very busy, but like ratty mentioned HK is a busy place. I will be going there in a few months and I can't wait!
If you crop the vegetation, you lose the highway. I would keep that. I've shot thousands of images in Hong Kong and this is a typical scene from one of the mountains. Very rarely does the vegetation give way to allow a clean shot on these mountains.