A lot of it is down to luck.
Like for example I got with a lovely guy, highly ambitious, educated, was chosen out of hundreds for job roles, sent all over the world to train other people. Given holidays in 5* hotels as "bonuses".
Behind closed doors, after giving birth to his two sons he turned out to be controlling, abusive, moody, SO SECRETIVE, and wanted all his old freedom (and his younger, childless ex girlfriend) back. Which he went and got. He left me devastated and depressed. I was supposed to pull myself out of it, brush myself down and move on. Be this big powerful single parent figure that you hear about on here... do everything, run the house, full time job, raise my kids, cook... but after years of abuse I just had nothing left. I felt rotten inside and out.
My eldest who is 8 is suffering the effects of all this. He is terrified of the world. He gets barely any enjoyment out of life. He remembers it all. The way ex spoke to me, the breakdown I had which went on and on. Youngest doesn't remember any of it and was only a baby when I started out on my own and eventually sorted myself out, got into a healthy routine, and drew up a new future for us all. I was so much happier by the time youngest turned 3. He's about to turn 4 and just bursting with happiness. Nursery ADORE him he is so quirky and confident. He's very lucky he was too young to witness what went on with him and his dad and my subsequent breakdown.
Who knows what is around the corner for us now I've looked into dating again? Another abusive relationship? or a genuinely, lovely affectionate man?
All I know is, after having an attitude like yours for the last god knows how many years is that the dark cloud around you just thickens and it's harder to find your way out. Think of things you've always wanted to do and start planning how you can achieve them. Start now.