I'm not very damaged, I've always been this way regarding my sister and extended family (ever since I can remember).
I DID tell my mother from a fairly young age but instead of figuring out what could be "wrong" with me she just blamed herself.
Over the years my mother had also said that my sister never really helped her cause (which is why my daughter doesn't really like her).
Examples of this are:
When she visited once my DD was happily watching Tangled and my sister just unilaterally turned the TV off because "Disney princesses are a bad example".
When my DD was about 7 we were on a holiday together and she wanted to go to the beach, but my sister wanted to go shopping but we couldn't split because it was our joint holiday and instead went shopping all day.
She did call my DD's father a gold-digger a few times and upset the whole family. (In fact before we got married she said she needed to talk to a solicitor ASAP to arrange a pre-nup, she did this in front of him BTW, and no, we're not rich...)
If she buys my DD present it always has some sort of condition, last year when my sister was visiting they went out, my daughter wanted something but my sister didn't like it, and she wanted to buy her some skin care, my daughter say "no thank you" and my sister's reply was "well you stay ugly". I wasn't there but I believe my daughter.
Now, regardless of my lack of attachment (which is now more or less explained by ND) my sister rarely (if ever) approved any of my life choices and was also very vocal about it.
Yes, she's not a bad person but I also don't think she's been that great at times and my mother never knew how to "manage" us which never helped.
Examples of this:
The whole bully episode is pretty black and white (this guy destroyed my self esteem and he's the reason why I stopped taking photos of myself for almost 20 years).
When I visited her one summer she was living with her boyfriend, and that's fine. However there were not enough beds nor bedrooms and they decided to have sex literally next to me :/
She always told me I belonged in a mental institution (which I kind of get now) but no, I wasn't "mental".
Has also called our mother a "money grabber' - you can see there's a pattern there.
During arguments she just doesn't stop. When I moved to the UK we were at the airport, she asked me to burn her some CDs and I said that I would, but I just needed whatever she wanted and I'd download and burn, and that she could send me an email or whatever. She never did. So I never burned those CDs and at the airport started shouting at me because I couldn't even do that. My uncle (the one I really really loved and she accused me of only getting close to because of his money) got involved, I ended up crying in a corner hyper ventilating and I think maybe even security got involved. All because of some CDs.... My ex husband always called her a complete bitch BTW.
The one thing I really appreciate is that she never made a big deal that I didn't go to her wedding. It became very tainted thanks to a few comments made by other people (including our mother) but ultimately I didn't want to ruin it for her, I knew we would fight (as we always do) so didn't want to ruin her big day.
Our family dynamics aren't great. We don't even live in the same country, so my daughter was never really going to be super close to my side of the family. I'm sure if you ask her about my mother she'd be fairly indifferent too and it has nothing to do with our family dynamics.