Hi shakespeare, I'd say that it sounds like you've made a bit of a breakthrough there which may be really helpful to you, congrats
But if I can just throw something else out there, maybe it can help, maybe it won't but.......I don't think you necessarily have to always question the validity of your thoughts.
If you have painful, hurtful, "unproductive", "damaging" thoughts/thought processes in relation to a bad experience.........just because they're all that doesn't make them invalid, absolutely they're valid, they're understandable, they're "reasonable", you have a right to feel/think that way, it makes complete sense, and those feelings thoughts should be respected...........but I think that's what you're saying in taking them seriously anyway??
So it's not so much as questioning their validity, it's more in trying to find other (still understandable) thoughts/thought processes more helpful, to you, you might be able to implement.
So if you do feel........in relation to something, it's not wrong, it's not a "weakness", it's not you over-reacting, but if you can find an alternative in all of that........something that might be more "beneficial" to you............doesn't even have to be straight away, sometimes it just can't happen straight away and sometimes it might take years and years and...........
And gradually if your thoughts, then your thought patterns can change at your own pace, in your own way..........it can become more "natural"...........I'm not saying everyone can completely change their thought processes........some can, some can't depending on lots of factors, but you're right there can be hope out there.
Just some thoughts.........
And, I'm sorry you had to endure that with your family
It's natural that you must have felt negatively "judged" in therapy........as if you were at fault, as if your feelings were invalidated considering what you'd been through. But you, your thoughts/your feelings were not at fault, it was the way you were treated that was at fault
Just really good that you seem to be making progress now.

Alison