I was in SF yesterday for the first time in about eight years. I can't say I witnessed crimes, but I will say that the homelessness problem is much, much worse than I remember. It's hard to see any of these problems changing without it becoming cheaper to live in the city, and without more housing, I don't know how that's a possibility.
I see a lot of people talking about how people are homeless because of addiction or mental health problems, and there are certainly people who are homeless because of those reasons. That being said, homelessness seems to track much more closely with housing availability than social policies[0]. SF is such a beautiful city — it's sad to see all this abject poverty throughout it.
0: https://www.sightline.org/2022/03/16/homelessness-is-a-housi...