Hey, I am actually in a similar boat, I had applied to 17 schools and got rejected from most of them. Only interviewed with 3 (still waiting to hear back), which were not my top choices. I am international but I am currently in the US. I have a Masters' and have 6 years of research experience. I had heard that the more research experience you have the more it helps, but definitely didn't help me in my case. So I don't really know what all you need to have to get into a good school. UCSF is definitely not international friendly, I am currently working at UCSF, and my PI couldn't help me get in.