It's wild to me that your coilover was toast after so few miles and (sorry for stereotyping your wife's driving style) being on a wife's daily driver.
Was the shaft of the coilover pitted? That'll do some serious damage to the seals as it moves during compression and rebound.
Ha. Yep, definitely my wife's daily driver and less than 9k miles. Hazzard Fabworks said the shafts were not pitted.