I truly don't think you're unlovable. Your mother was a real piece of work, similar to mine.
There are plenty of men out there who 'love' a woman for the sex, if she makes him look good to his peers, if her life revolves around his. They're not capable of love. They don't care to know her, her interests, they don't really know their children either. She gets sick with cancer or something, he's gone. Midlife crisis, he's gone.
The abundance of those types may seem to make women who aren't docile and compliant unlovable. It's not true though. Your mother was hyper critical and not loving. That has nothing to do with you and everything to do with her not being able to love.
I've been married 2x. 1st DH, pretty sure he loved me but it came at a price; controlling, alcoholic.
2nd H just pretended to love me. He said my success made him feel inferior. He said he was jealous and resentful.
I keep hoping there will be just 1 guy out there who can love without being, insecure, expecting me to kowtow to him, etc.
I've wondered sometimes if I'm unlovable as I am? Because I don't smile and defer?