my other family members keep bringing the negative up
This is really too bad, but not uncommon. People can have many reasons for sabotaging the plans of others, both consciously and unconsciously. Many of them fear that our success will highlight their failure. Many are afraid that if we get healthy, we won't need them anymore. There are many other reasons too.
But the key is that you realize this is your story, not theirs. I have had to tell a lot of people (family, friends, and coworkers), that while I appreciate their concern, I made a choice and a decision for myself. I took a lot of time, did a lot of research, and chose great doctors. If they want to support my decision, fantastic. Otherwise, I asked them to keep their comments and advice to themselves.
That is a hard thing to say, and hard for them to hear. It has also strained a couple of relationships. But I am certain I am on the right path.
One thing that I have heard twice in the last couple of weeks when i talked about my surgery... "Oh, you couldn't do it on your own?" The first time, I let it go and walked away. The second time I couldn't.
I replied, "That is the most demeaning, demoralizing, and sabotaging thing you could have said to me. Would you say that to a cancer patient? Or an alcoholic? I am doing this 'on my own'. Neither my doctor, or you, are going to help me live through this change." That ended the conversation very quickly.