The complaint is factually incorrect. I visited BitMEX while on a holiday trip to the USA. Immediately I got a notice of account closure, banning me from trading and telling me to withdraw my funds in 7 days.
I petitioned support and was unable to get my account restored.
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It's impossible to monitor EVERY single hack in the crypto space, but BitMEX has actively worked to do their best to track and freeze hack funds.
Their customer service is incredible, when I had an issue with their API, I got a direct response from the CTO fixing my code for me, within the same hour.
When I had a dispute with instrument methodology, one of the founders got back to me in the same day, explaining why.
It has never been hacked or suffered a serious security breach. The only thing I remember was a one-time accidental CC instead of BCC in the newsletter program.