I agree that many of your points present legitimate difficulties with the use of public transit in the US as it currently exists. However, I think that the first two points are just as true for ride share as they are for public transit. Ride share also has crime (see sexual assault scandals https://money.cnn.com/2018/04/30/technology/uber-driver-sexu...) and ride sharing (particularly pool-style) also "forces you too come into contact with people you would not normally choose to associate with"; some people (including myself) see this as a benefit of public/shared transit, not a drawback.
Part of the problem is that public transit scales differently from ride share. The more riders public transit has, the better it gets. The more riders ride share has (beyond a certain point) the worse it gets.
Part of the problem is that public transit scales differently from ride share. The more riders public transit has, the better it gets. The more riders ride share has (beyond a certain point) the worse it gets.