When exactly did San Francisco go to shit?

So I’ve lived in the Bay Area (not sf) my entire life. I’m a 90s baby, I have happy memories as a child of visiting San Francisco and enjoying it. But the older I get the more absolutely hate that place. My visits there get farther and farther in between. The last time I went there, which was two weeks ago, I got off of Bart at 16th st mission and as soon as I stepped onto the street, my nose was violated by all of the terrible smells, and I was surrounded by danger and pee and poo and people shooting up and drugs, and I just thought in that moment God, I just never wanna come here ever again.

Were things always like this? Or was I just ignorant as a child or as a young person visiting and was blind to it and didn’t notice it? Or was there a specific time or decade where everything just went so completely downhill?

Most people say politics and liberals are to blame, but I don’t want to jump on the bandwagon. I like to hear opinions.

And maybe San Francisco locals will call me ignorant or disrespectful and I probably am and I apologize for it. But when and why did things get so absolutely terrible over here? Just curious of people’s opinions.

PS I have never lived in San Francisco if that makes a difference