[jghn]

If you don't have many rides a single 1 star review can knock you down a lot.

Also, I lurk in r/uberdrivers and one thing I've found is that a) some drivers are just jerks and 1 star at the drop of a hat, and b) some of it seems regional as well in that some countries/areas are more likely to use the 2-4 star options for minor things.

IIRC Lyft only looks back over the last 100 rides, which allows old ratings to cycle out. I know I've only been dinged once on Uber in the last several years but the rating is still held down by some old dings in the early teens.