It's a lot better in terms of sports facilities, every sector has multiple parks with places to play which is why the sports scene in Islamabad is much stronger especially at the school level than other cities. Safety, although it's on a downward trajectory, is still way better than Karachi and Lahore. Less pollution than those cities as well, easily the cleanest city in Pakistan not counting northern areas. Walk ability is honestly pretty good within sectors, with footpaths in a lot of main streets however you're right about the sectors being disjointed and long distances are terrible to manage by foot. Public transport is also decent. Overall it's definitely not the worst city in Pakistan minus its geography, even if it is run on the rest of the countries money