Point blank, the inability to deny people entry to transit and to use transit as a mobile shelter is having catastrophic impacts on overall transit use. This is the equivalent of saying the school system is broken because people keep showing up at schools and screaming at people, assaulting people, soiling themselves and the facilities and the staff have no ability to separate them or remove them from the school, so the rest of the students get home schooled or private schooled and effectively don't have access to public school. (Oh yeah, and tons of teachers and staff quit)
They need HELP and a transit system as a shelter and drug safe use space is just about the least efficient way I can imagine to help them and makes it less safe and accessible to everyone else.