I agree. The monster in the room is that these guys were trading way too big to compensate for a sub 10 VIX to offer attractive returns. Selling vol the last couple of years was lucrative but it should not have been as lucrative as some of these funds have shown. The market has been forcing vol sellers to accept lower and lower yields. This of course was not acceptable to these funds so they sized up way beyond what should have been appropriate.
Nobody should have been blown out by a move up to 35 in the VIX. We use to see two to three 10% corrections a year and the avg mean level of the VIX for over a decade was close to 20! This is simply a case of juicing returns to satisfy investors.
Even in that "juicing" these guys were long the equivalent of 100percent xiv. That's ludicrous. If they were running that kind of risk they should have made at least 100percent last year.
Perhaps they were selling tinies in massive notional compared to their equity, which exploded in value as the vix rallied. But not prudent short vol biased trader would do that.
I can only explain it as gross negligence.