You're feelings are absolutely valid op.
We see so many things online about recipients of organ donations, young men being able to play football again, recipients walking the daughter of their donor down the aisle, parents rejoicing at being able to hear their child heartbeat again through the recipient.... and on and on it goes.
In my experience its just not like that, and it isn't talked about enough.
My son died, he was very young, and I was able to donate his organs.
I never felt this huge sense of pride and obligation, more like I just didn't want someone feeling like I was at that moment and it made no difference to my situation at that point.
I received a letter giving basic details of the people who's lives his organs improved and saved and I felt nothing at all and they were all children. I wanted to, I really did, but I just felt empty.
I braced myself for wanting to track them down and be all joyous and have these kids become like a second family etc, but there was just nothing.
This was quite a few years ago now and I still feel the same. I know it sounds utterly heartless, and I know it sounds even worse that if I could choose them all being sick again but me having my son back I would do it in a second.
I can hear myself and I know I sound awful, I really do. But it isn't like we expect it to be when we make these decisions.
I'm glad that organ donation exists, and I would definitely make the choice again, and am on the register myself, but its more because I would want that help if I was in the position to need one for myself or my kids .
I'm so sorry you have to miss your dad op. Don't be too hard on yourself 