I looked at this awhile ago. There is a google doc maintained by some anti-Tesla investors who track every fire that can find. It is still much lower than the US average fires per car.

I think it gets more attention because:

1. some people are financially incentivized and;
2. battery fires really are a much worse deal than a normal car fire

The advice I’ve been given (on train/bus batteries) is to shove the vehicle if safe when it starts; then do whatever possible to fully submerge in fresh water. Obviously that isn’t really feasible.