How long have you lived here? What were the conditions when you arrived, versus what you see now? What areas do you frequent?
Have you ever made friends with a homeless person? Do you know anyone who has been homeless in the past?
In my ~20y in SF, I have seen the exact same issues and political divides repeat over and over. There are certainly issues which need to be addressed, but the constant insistence that there is some short-term degeneration constantly leads to the reimplementation of solutions that do not work, particularly homeless sweeps and policing of nonviolent property crime.
Real solutions take time, commitment, dedication, and engagement from and with the community, not just shouting at a handful of politicians. That isn’t gratifying enough for most people, who want to see some overnight transformation, which is what leads to homeless people being shifted around from block to block based on who most loudly demands that seeing the poor on a daily basis makes them unsafe.
Further, this strategy prolongs and ingrains people being stuck on the street. Having access to the resources that help people get off the street, heal from addiction, and not be so desperate as to engage in petty property crime for survival makes everyone safer, including the folks currently living on the street. Being able to establish semi-stable communities (“encampments”) where they can rely on each other to watch their property, often including medications, identifying paperwork, treasured possessions like family photo albums which keep them tethered to reality, is key to seeing them improve.
This is the strategy upon which navigation centers are built, and while not perfect, it works for a lot of people.
The, “tough on crime, I don’t want to see the homeless”, strategy which has continually failed for decades actually, counterintuitively to many people - esp newcomers’ - perception, makes us all less safe. If there has been a decline in SF since you’ve moved here, it is almost certainly because of these wasteful, costly, and dangerous approaches to public safety and health.
It doesn’t matter how many condo towers are built, SF is never going to be a gated community. If you want to live in a gated community, I suggest you move to one.