Sounds like you are having a tough time getting to the final donation process. It is a long long process especially if you participate in a chain since, as you have come to find out, there are more and more links along the way so more and more changes can happen.
Being part of a chain appears to help more because you get more people transplanted. But even if you would decide to help an individual recipient then you would be helping all the others on the list move up. Often we think about the quantity. In your 16 pair exchange one would assume 8 people would get kidneys. How many people in those chains are on their second or third transplant, how many are more at risk of rejecting or have so many other co morbidities that the chance of the kidney lasting is lower than another? I am not trying to judge but what I am trying to say, is that what appears more or better on one hand often cannot be evaluated fairly because we just don't know. No one does. So if you decide to offer your donation to a single person you may be saving one life but you never know the ramifications. The gift is precious no matter. I understand why the chain seem so much more desirable but you can make a difference even with the one. Just something to think about.
You also mentioned why you couldn't understand why more people don't do this or are somehow indifferent to people's suffering because otherwise they would do this. Donating a kidney is a big deal. While it is often considered a "spare" because most people can live with one, it is elective surgery with real risks. I am sure the hospital has explained the risks of bleeding, hernias, infection, even death, future health complications or probelms obtaining insurance.So it is not that people are indifferent to suffering they may not be able to assume that risk. So I can certainly understand why people do not volunter to donate. If it were as easy as giving a pint of blood all the doctors and nurses who work with all the patients they see day in and day out would have given up their "spare" if they passed the medical tests.
Just some of my thoughts in response to yours. This is a stressful time. the waiting is tough and it takes so many pieces for everything to fall into place. I hope you get to donate when you want to and in a chain you desire. Best wishes for a healthy and positive donation experience.
Sherri