Agreed on all the above behaviors. The sf taxi system is abysmal. I was on crutches for 9 months and they made getting to work hell [1]. Between their unwillingness to tell you if they're actually going to come get you and their inability to keep to anything like their estimates, they treat customers terribly. Hell, people jumped to uber when you used to pay significantly more, just to avoid sf taxis.

Some cab drivers were nice, but they simply aren't part of a functioning transport system in sf.

[1] https://news.ycombinator.com/item?id=8135934