@hoven as kindly as possible you sound very unhappy and quite defensive but you're not helping yourself.
You seem to be incredibly rigid in your perspective on this which slightly begs the question as to why you have sought other people's views on this. It is, as you say, a discussion forum, and while you are absolutely entitled to your views, coming on and banging away with such rigid certainty undermines the point of such a discussion.
If you're absolutely sure that leaving a miserable marriage is impossible, crack on with it. If there's a degree of uncertainty in your mind there may be merit in hearing some of us out.
I'm not going to tell you you have to leave your marriage but you can't have it both ways: you can't come onto a forum like this and insist it's wrong to leave a marriage when you so obviously want to leave yours and then, in the face of positive stories, insist that everyone else is wrong.
There's actually a huge spectrum in what happens when marriages break down, from utter disaster to very constructive scenarios, and a lot of this is dependent on mindset and how people tackle the situation, so pigeonholing it as disastrous in all scenarios is incredibly unhelpful.
If you engaged with people in a more nuanced way you might find there are people who could actually help you.