I am not sure how can you compare mumbai and bangalore. State of infrastructure on a relative basis is far better than in bangalore. In mumbai you can travel almost a minute per km. In bangalore it takes 2 hrs to travel 20 kms
Also mumbai people are much more aware,active,disciplined in public and have better civic sense. Can you even compare Bangalore's city bus service to BEST? Or traffic sense of Bangaloreans to Mumbaikars?? You dont need to pull some other city down just to show that bangalore is "Not Crumbling".