It sounds to me like you do look down on your friends, and they are picking up on it. TBH, nothing is more annoying than a formerly fat person who feels the need to evangelize, especially the ones who seem to believe all fitness struggles are created equal and try to push their friends into having the same priorities. That may or may not be you, but it kind of sounds like maybe it is.
It also sounds like you’ve outgrown these people, and it’s time for you to connect socially with people who are in the same boat as you, relatively successful and happy. That way you don’t come off so much as bragging but you can share in your successes together. Outgrowing friendships is a common and a real thing, and nothing to worry too much about. Just find people more like you.
As for your general question, there are many people in my husband’s family who are wildly financially successful, including at least one billionaire, and I wouldn’t trade places with them in eight million years. They are miserable fucking people devoid of a single genuine relationship, they are morally bankrupt, they are bereft of meaning. All I feel when I am in their presence is pity, and I think they sort of hate me for being happy with so (relatively) little. My husband and I are visibly madly in love after 14 years together, and I imagine it’s terribly hard to witness a genuine loving relationship at every family function, year after year. Certainly some of the wives have tried to destroy others’ happy marriages before, out of spite. When the grandparents die, there is going to be a complete clusterfuck of greed-induced drama, and we have already decided we want no part of it.
That doesn’t mean you can’t be wealthy and genuinely happy and good to others.** Sr. Weasel**'s Dad is a good example of doing it right, although he does have blind spots as a result of his privilege. He respects that we don’t want a lot of the standard trappings of success, like we are happy in our enormous double-wide manufactured home, and do not need to live in a fancy neighborhood. He respects it but he can’t help but push the narrative unconsciously. There’s always talk about how my husband could make more money as a psychologist. Our income bracket is solidly upper middle class, though you wouldn’t guess because we live in a manufactured home and drive economy cars (yay Honda Fit!) According to FIL, who runs the place we live, our income is three times the average of people living in our community. There’s not really a need for more money. We still have obstacles and choices to make, and financial frustrations (we have a lot of student loan debt holding us back) but what we make is insane relative to how I grew up, and how we struggled in grad school, you know, enough is enough. TBH I kind of like the challenge. It’s not like we’re living hand to mouth, so why should we have it too easy?
We are also more financially well-off than many of our friends, so it’s not like we discuss the challenges of squeezing in both a personal trainer and a housekeeper in front of the guy working two jobs to support his family. Nobody who is struggling financially wants to hear that shit. I know because I’ve been there, and not too long ago.
Success is not inherently bad. The problem is when you start defining yourself by it, or when you assume others should be able to achieve all the things you can, or when you assume everyone else must deep down even want the same things. To some extent we earn success and to some extent it’s the luck of the draw. And we always define it differently depending on who we are. Stay humble.