It's a problem that intersects with the national issues related to... under-served and poorly integrated people in the population.
National policy needs to do much better on an array of issues that contribute to 'poor public transit experiences'.
Issues like "mentally unbalanced passengers", inebriated, smelly (includes smokers!), overcrowded busses. I know they are rigged for standing room, but that should NOT be the expectation for a ride longer than 10 min outside of extreme crunches like sports games overflow!
Aside from running the correct busses to the places people need to get from and to:
I want the modern version of Star Trek utopia.
* American Dream (home ownership, vaguely near the jobs / family) within reach.
* Jobs that are a good match for worker's skills / family time needs.
* 'Child Care Assistance' - more than just schools, facilities that can help take care of children while parents work, are unexpectedly sick, etc. Daycare+++
* 'Employment Assistance' - connect workers with the best jobs that want them
* Diversion programs to help people with 'issues' that prevent access to jobs overcome VARIOUS issues such as: lack of stable food, lack of stable housing, supplies to keep clean and healthy.
* Recognizing people that aren't helped by current medical technology and social programs and assisting them with possibly contributing in unconventional ways, or simply being taken care of properly if they are cursed very beyond medical help.
Every last bit of that is more than just fixing a transit system.
Society as a whole system needs an approach that remedies and modifies the entire problem from all angles. Including the ones that change where people need to go for jobs and housing.