I knew this would be your thread.
You still haven't gotten it, have you?
No matter how bad the marriage was, he was still with her and you are the OW.
That is how they see it. Your daughter is a product of that, undeserving, yes, but still.
You refuse to accept responsibility for hte breakdown of the marriage, over and over and over.
The ex is alcholic, horrible, crap mum, etc.
Yes, yes, yes. But he was married to her.
As every post of yours on here makes it obvious you don't acknowledge responsibility for the hurt and pain your actions, and your partner's, caused, it goes to follow this is apparent to others in your real life.
Hence, their unacceptance of your relationship with him and your child.
There isn't anything you can do to force people to behave or feel as you feel they should.
So, as stated ad nauseum, you just need to move on from it.
It upsets you. Yes, you upset them very very much, but it continues to be all about you, him and her.
So best of luck moving on from this.