He was hospitalized not by choice & his wife found it very difficult to visit or to get him out.
What's that got to do with it?
He was hospitalised because he had Covid.
I've no doubt his wife found it hard to visit. Many people found it hard/impossible to visit their relatives because of fear of contamination and causing the virus to spread even further. People at my church who were hospitalised with Covid were not allowed visitors - unless, possibly, they were dying.
Hospitals and doctors are there to care for peoples' health, not pander to their conspiracy theories. A patient who was highly infectious with Covid would not have been allowed out in case they infected others - children, the vulnerable, those with respiratory conditions etc - no matter how much they declared it all to be nonsense.
Look at it from another point of view; a hospital patient with an infectious disease believes that disease doesn't exist, wants to go home, infects someone in their family who passes it onto one of your relatives, and they die.
Are you going to say,
"the hospital is at fault for discharging an infectious patient. They had a duty of care, they messed up, we are going to prosecute/sue"? Or,
"it's fine. The patient didn't believe he had the illness he was diagnosed with - he had a perfect right to leave hospital and potentially infect others"?