You're literally "made to feel" certain ways. During your formative years someone was shouting you suck and generally acting as you're a burden and unwanted? You'll feel that shit for the rest of your life no matter what you "decide to think". It becomes ingrained in you. It becomes who you are. You can work on it like GP said and improve the situation but don't act like it's trivial or just a change of perspective. It isn't. It's like your body needs healing after a fractured bone. Your mind also needs that time and setting.
I'm not saying that trauma isn't real, I'm saying that it doesn't have to impact your prospects in life. You don't have to let it define you. There's a capacity to sidestep it
Here's a personal example: having abusive family members tell me I won't be successful or independent, being hurt by it but knowing in the back of my head that I would get out of there. It's hope
And I get it: not all trauma is equal here, but if I have to choose one extreme I'd prefer the one that gives people some shred of agency