Your attending doctor is right. Your father has no obvious conscious activity at present, and there is no phenomenon of obeying orders. If the MRI is brain stem injury and left frontotemporal contusion as you said, the chance of waking up is very small. Brain stem injury directly affects the conscious activity. Brain hernia has been formed before operation, and now there are still high muscle tension and limb dorsiflexion.

Generally speaking, we say that it is usually a recovery period of 6-8 months to see how the recovery is going. Including physical activity and state of consciousness. Theoretically and clinically, hyperbaric oxygen therapy does have a good effect on some patients and can partially restore consciousness, but there are still patients whose consciousness has not improved after treatment. Look at your financial conditions. Do more hyperbaric oxygen when conditions are good.

If all complications, including lung infection, are controlled, you can leave the hospital and go home for further treatment.

As for going to court with the boss, there are clear provisions in the law, so I suggest you do disability appraisal first. According to the results, it includes lost time, compensation for mental damage, escort fee, treatment fee, nutrition fee and so on. You can consult a lawyer. It seems that I heard that there is no employment contract, but the person who produces the employment fact also has to pay compensation.