I was actually still hopeful and actively trying to change things until maybe a couple of years back. (I'm 44.) Even now- it's not impossible that I could work at changing things. It's more that I now have 44 years experience knowing what hard work it is to keep trying. Keep taking risks, literally turn your whole life upside down in the hopes it will work out for the better. My own conclusions are- that it was never worth it! Perhaps because I didn't tackle the underlying issues I have- social anxiety and a crushing self doubt around others. But, I've gotten to the point where I'm just exhausted, lethargic, unmotivated, disillusioned, pessimistic and cynical. It's more comforting to me to stay as I am. Not keep on challenging myself because I don't believe the outcome will be worth it.
So- it's not quite so much that I feel incapable of change. It's more that I don't see enough incentive to keep trying.