First of all, sorry you had to witness that, I'm sure it was traumatic.
I have to say, I'm a bit surprised that you attached the message from the crew member that seems to contradict much of your version of things, although you do get points for transparency there! Also, your review was very critical of the dive op, but it sounds like they responded appropriately from the crew members message. Are you saying that this site is so dangerous that you need to warn people not to do it if they aren't in great physical shape? That's really not the OPs fault, it obviously isn't so dangerous if you did it 20 times.
As far as your specific critiques, 1, 2 and 3 seem to be contradicted by the other account from the crew member who managed the situation (you did not, correct?). Maybe the other poster in this thread who was there will chime in? We can't really assess that with the limited information that we have.
As far as an AED goes, I have not seen one on a dive boat, since they really wouldn't help with the vast majority of dive emergencies. They are for shockable pulseless arrhythmia (V Fib and pulseless V tach), and it's hardly a reasonable critique of a dive op not to have one on board.
And as far as your last point, what sort of emergency recall system would you suggest for a diver with a 34 minute deco obligation? In rare cases, someone has to make the hard call to leave a decompressing diver on a mooring ball, alone in the ocean, while the dive boat leaves with an injured diver, but there are a lot of logistical implications of that, and it might have been quicker to wait for the Coast guard.
If your point was that technical diving shouldn't be allowed at this site, then make that case, but other than that, this criticism doesn't make sense. This doesn't sound like the sort of guided recreational single tank dive that would lend itself to everybody descending and surfacing together.
When you go ocean diving, especially at a remote site, you are not guaranteed immediate access to high level medical care in the event of an emergency. That's not a fault of the dive operator.
We don't know what actually happened to this diver - cardiac arrest due to exertion, immersion pulmonary edema, arterial gas embolism or decompression sickness could all be seen in the described scenario. It would be interesting from an accident analysis point of view to get any follow up that is available.