Wow, talk about exaggeration... I live in Kyiv all my life, but travel to San Francisco frequently. And the latter feels MUCH more dangerous (especially around the Tenderloin area where most startup offices are located). Drug addicts, homeless and mentally ill everywhere on the street, it smells piss, it's hard to walk for 10 minutes without someone yelling obscenities at you, gun violence is ridiculously high, etc. With the new bright president in the US, it may get much worse — hate, anger and division spread like plague. You can find negative points like this in almost any place on Earth.

I traveled the world quite a bit, but never felt like relocating to any other city — sure, they are huge issues, but if you surround yourself with good people, it's wonderful to live here.