Dear legolo,
I am so very sorry this has been your experience.
I can only partially understand what you have experienced in that I grew up with one parent who was constantly critical and at times abusive, and one who was (for the most part) supportive and loving. The mixed messages fucked with my mind, and I grew up with some pretty messed up beliefs, but also some healthy ones. Once I moved out on my own and got some distance from all the confusion, I was able to see things more clearly and start to work on my beliefs that were messed up. The fact that I had at least enjoyed some support while growing up definitely made that work easier for me than it would have been without it.
You have a longer and steeper hill to climb. But I think you have the strength to climb it. I'm going to recommend
Counting Victories again and also
Daily Gratitude. You've acknowledged that you have trouble seeing the good in yourself. Counting Victories will help you learn to do that. Daily Gratitude will help you to better see the good in the world around you.
I was taught many years ago a similar exercise, Gifts and Blessings, in which every day I had to write down one thing I had been blessed with that day and one gift I had given of myself out into the world.
These exercises are most powerful if you do them for yourself and do them consistently. But in case you are feeling stumped in getting started, I offer these examples for you from today:
Victory: You got out of bed on time. -- Do not discount this! Some days our victories are big. Some days they are small. Getting out of bed on time is a goal you set for yourself. And you achieved it today. That is a victory!
Gratitude/Blessing: You have a nice, warm blanket that gives you comfort. -- Again: no discounting this! We can all look out at the world and see ways in which our blessings could be bigger but aren't. But focusing on that is a path to unhappiness. One of your goals is to work on being happy. Focusing on what you do have is a way to do that. Look out at the sky at night and see that vast sea of blackness in which nothing can live at all. I don't know the extent of the light pollution where you live, but if you have an opportunity to go somewhere where you can see stars, do it, and realize that the vast majority of those stars are too hot or too cold or the wrong size to have formed planets in their Goldilocks zone to support life. But we get to live on Earth, a freak anomaly of a planet that's just the right size, and the right distance from Sol, tilted at just the right axis, and with a moon of just the right size orbiting around it that it's made a pretty decent home for our own freakish and fragile species. This is a blessing indeed!
Gift: In your post above you thanked me and you complimented me, telling me my words to you had been kind. I put myself out there when I wrote what I did, disagreeing with your previous assertion and suggesting positive traits and acts which I see in you. Complimenting people is something I was not able to do in my youth, as a result of my own childhood traumas. I was actually quite phobic about it, fearing people would laugh at and ridicule me if I tried. I fought long and hard to overcome that fear. Today I can do it. And today I understand that if I offer someone a compliment and they are unable to accept it, that lack of acceptance is a product of their demons and not about me at all. But it's still nice to offer someone a compliment and have it be accepted. When you accepted my words, you reinforced the positive and hard work I have done to better myself. And you offered me a compliment in return--which I know from my own experience is not nothing!
Stay strong, legolo. You can do this!