What is happening?

I wish someone could just explain what is happening and why. I can't concentrate on anything, my dad is always at the back of my mind. He only retired in 2015 he's 72 years old. He has had so much going on it would take an age to write. But most recently 12 weeks ago. He suffered 3 strokes within a week. He stayed in hospital for 10 weeks. His recovery was slow and is now very limited. He cannot walk, move his left hand. his right arm can move and lift but he struggles to bring the arm to his face. But he can if he pushes himself. He is now bed bound. He is peg fed due to the stroke affecting his throat. He has been in a temporary bed in a nursing home for the past 2/3 weeks, as the plan is to send him home. With carers out 4 x a day. I didn't like the idea. But it's my dad's descion. He still has capacity. Although he doesn't engage very much and often stares or just watches the tv. Yesterday he was sent to hospital as his oxygen levels were low and he was sort of breathing fast and shallow. They did a blood test and it showed his kidneys aren't functioning very well. He does have a chest infection the doctor told me tonight. But they are not looking into his kidneys as they want to get his oxygen levels right. He seems better today, but he is not emptying his bladder (this is a first) and he has no urge to go so they have put a catheter in. My dad has I guess given up. He's hard to talk to and won't engage with me. I find this very hard emotionally. But I try to see the world from his point of view. The only thing keeping him alive really is the peg feed. He just seems to be going downhill. And it's one thing after another. Why is he being tortured?