I can relate. You know, sometimes it isn't the people who change but their mask that falls off...
With mine, i think she kept refusing to think through important things in life (e.g. religion, parenting style, etc.) and addressing other things (e.g. when she disagreed with me but wouldnt talk about it), and she assummed they would all work themselves out without her putting in the effort. The pressure built up and she eventually snapped. This changed her.
I can see your point too - maybe she always has been a slightly depressed and unhappy person who doesnt want to take responsibility.
Either way, i dont see her changing into someone i want to be with anymore. Maybe that will change, but she has a lot of work to do first.
M:39 W:36 - D1:2 D2:6 11/19/16 BD1: ILYBNILWY, EA/PA Dec/Jan: MC, pursuing, not DBing 1/11/17 BD2: W wants 1 month break 2/1/17: Divorce Remedy. Start DBing 2/17/17 BD3: W - separation to start D process