The other question is what did they doctors do for treatment at the hospital. Ventilators and remdesivir damaged people’s lung and destroyed their organs. More people likely died from the treatment rather than the covid.
COVID causes severe blood clots in some people, particularly in the lungs. It is one of the things that doctors have been studying and that apparently is unique to COVID. He did not get remdesivir to the best of my knowledge (although I am not a family member so I do not know his exact treatment). As for a ventilator, that is not what kills you, when they put you on one because they have to at that point, you are cruising toward dead anyway, it’s just a matter of time.