Thank you for explaining this from a geospatial perspective as I came to do, I assume you are also a geographer. Not everything is a conspiracy or intentional injustice against marginalized people, rarely there are less sinister and more mundane causes. This isn't the best city to live in for people, its growth was caused because the region could be exploited for its numerous resources conducive to heavy manufacturing, and had access to easy transportation of goods via the rivers, not because it was suited for human habitation. If all these factors didn't exist, there would not be a major city here, the only advantage it has is being being at the confluence of two major rivers. The challenges of building a major city in this terrain had to be greatly outweighed by what it could offer. The terrain here makes building things that other cities take for granted infinitely more difficult.

Hopefully the OP can help spread awareness of these issues, and work to ensure that politicians are elected that are empathetic to the plight of people living with disabilities. So that this poorly maintained infrastructure can receive the funding to be able to serve the community properly.