Sorry for your loss.
You are lucky you didn't get arrested at immigration on an outstanding arrest warrant for grand theft auto.
You are lucky Hertz is writing off the large financial losses, most likely mitigated by your past business.
They've decided the risk of a repeat incident in the future is too high. Past history doesn't matter.
If you poke the dragon too much, someone new and higher up at Hertz might notice, change their decision, and decide to seek a civil judgment against you for the losses.
I'd take debt forgiveness with a lifetime ban if offered.