Reading through your posts,
@edteach - a couple of things stand out to me.
I have three brothers and we were all brought up in a very toxic home. My father was mentally and physically abusive.
You're right to remember this, when looking at your own response to your brothers actions/decisions. Siblings growing up in an abusive home will always develop a pretty complicated dynamic with each other, as well as being affected themselves. I wonder - do you think you felt responsible for your brothers even as a kid? Or, maybe you believed that you let them down, or they let you down? Do you remember if your father played each of you off each other at all, tried to manipulate or affe3ct your feelings towards one another?
Big foot, I have a tendency to be or see the negative side of life. I am not an optomist that is for sure. But i feel I live in the real world. Things are what they are and don't look at things as it will all turn out for the best. Most times in life it does not.
Also not surprising for someone growing up in your situation. Like the others were pointing out - there is a way that you can be a realist and still allow for the possibility of things changing. I'd actually encourage you to work on the notion that things can be going downhill, but often do have the potential to stop their downhill trajectory; or even slow it down.
My point is - change is almost always incremental, and everything in life is capable of changing towards the "good" or the "bad" - but also, the change can be about moving towards "neutral". There is such a thing as neither good nor bad. I think it's especially helpful for people who self-identify as skeptics or pessimists (myself included) to remember this.
I don't know if any of that sounds useful for you, just am offering it up.
My youngest brothers wife being 475 pounds does not affect me other than I can tell he is miserable in his life. I never said anything to him about it. But I can see that he is miserable in his life. He was told by his Dr. that he needed to dump sugar and start to eat better. He lives on McDonald's and junk food. So he actually did. He lost weight and was doing well but his wife made fun of him and attacked him relentlessly. So after about 6 months of eathing right and doing better he gave in and went back to the junk food. She never helped him take care of himself Hell she can not take care of herself and loves every minute of it. It is so bad he never took care of his teeth and he got an abscess so bad it looked like he had a hard ball in his cheek and lost all his teeth at 40. He now has dentures. So its hard to watch a family member make such horrible choices. I guess I felt like I was the one who had to help out the brothers,
I absolutely understand how hard it is to see a family member digging a hole for themselves, and to not know how to help. Or to have your help not be welcomed. I highlighted this paragraph just because I think that, yes - I understand how your brother's wife is contributing to the ways in which your brother is keeping himself down, and can see how her own health issue (obesity) relates to that. In some ways, it's no different from if your brother was trying to give up alcohol, and his wife was steadfastly maintaining her status as an alcoholic, and giving him shit for trying to quit.
And that's just one of your brothers....
It seems to me like there are three sets of relationships to untangle. There's how you relate to yourself and your history of abuse; there's how you and your brothers relate to each other as adults; and finally, there's how the three of you related to each other as children.
Each one of those three things is going to be influencing your behavior as well as theirs, all the way across the board. It's a lot to dig into.
I'm sorry if I missed this earlier - are you or have you ever worked with a therapist on any of this? Have your brothers?