I think what helps me a bit is to remember that my siblings, too, are victims of narcissistic syndrome.

I didn't think your brother dismissed you (but I'm not sure what tone he conveyed) but rather acknowledged your feelings by giving you a hug and letting your sisters understand your point of view.

It sounds like either you were the "neglected" child or the "scapegoat" .. very likely, both.

Maybe have another open conversation with your brother. Maybe he needed time to process what you shared. After all, he was on his way to the airport. See if you can make ammends.

Truth is, if your mom is a true narcissist, she likely spent years in her motherhood brainwashing your siblings to believing you were the problem. She needed their sympathies, much like water, to survive.

I think awareness is hugely helpful in breaking this cycle. I adopted the Attachment Parenting model and am hyper sensitive to ensure my children are treated equally.. not only by me, but by everyone. Maybe you can take a peek and see if it resonates with you.

At this point, if your siblings refuse to reach out to you, after learning about your viewpoints, it's best to continue the low-to-no contact with them. It's hard, I know. You can't single-handedly change a life long pattern of dysfunction. You'll hurt yourself trying.

Love your kids. Learn more about NPD and understand that you were not the problem. Due to your mom's trauma, she was unable to love any of her children. You may think she was able to love your siblings but once you dig deeper, you'll understand they were victimized themselves.

Big hugs to you. I can really relate with your story. PM me if you need to chat. All the best!