Hi and welcome, @JLC . I'm sorry to hear about your mother's abuse.
I have lived through this situation too. In my case, it was like the material provision of food and shelter meant I could be treated however they wished, with no care for my mental or emotional welfare. So it's almost like it wasn't opposing behaviours at all; one allowed the other, sadly. They could lie to themselves that they were a good parent, when they weren't.
It is not OK to provide for someone materially but abuse them emotionally or physically or in any way. I'm sorry this has happened to you. Do you have any professional supports in place, like a good GP or counsellor? Complex childhood trauma can leave a lifetime of damage. 😞 I have been working on it for years with my therapist, and have made good progress, but unfortunately I think it's something that can never be fully healed.