How dreadful for you. There are no words to take away the pain.
The NHS has a lot of problems at the moment with staffing and beds. It's terrible to think our loved ones didn't get the best, quickest attention that we would have wanted for them. Even if the outcome may have been the same it would be some consolation to feel everything possible had been done as quickly as it could. It may torment you for some time.
I also know the worry watching your loved one being treated, your hopes being raised only to be crushed again, the terrible unexpected phone calls from the hospital to say they have deteriorated, the shock of being told that they probably won't recover, and the terrible realisation they are not going to and you did not have a chance to say goodbye. It is all agonising and you'll probably replay it in your head over and over for quite a while.
You are in shock now and the most important thing is to try to look after yourself. Think what your wife would want you to do. She'd want you to take care of yourself, to eat properly, to have fresh air. Hug your daughters and try to help each other. Family is so important.
Life is enormity cruel at times and there is no way around the pain. Don't be afraid to cry and scream and shout. Everyone here feels for you. Xxx