I don't think that this justifies a negative, you're late and wasted the girls time.
Do you think she's just sitting there twiddling her thumbs anticipating your arrival?
It's naive to think that an SP only has a couple of bookings per day. She probably had another booking straight after you and may have left just 10 minutes or so to shower and get ready. If you're late then this wouldn't be possible for her so, rather than let the next "punctual" punter down she ditched you; and rightfully so.
That's a negative for you, not her and it's you with the arrogant and selfish attitude.