Can someone consent when they’re in a bad mental state?

Hey, I’ve had a situation a few months ago and I still don’t know how to feel about it:
Long story short, I had an online dom and we had known each other for a pretty long time then. A few months after we met, I experienced a lot of sexual and mental trauma. Due to that, I was in a really really bad mental state and he knew about it. He still initiated sexual stuff and pushed me more than he had ever done before, but I just went along with it because I felt like I was worthless after the trauma. It was all online, so it’s not like he had actually forced me.

Is this a red flag? I technically did consent, I didn’t stop it, but at the same time I feel like I was in a place where I actually couldn’t consent? I had told him how I was feeling and how I felt like I deserve to be abused, he knew all of that. I feel like he took advantage of me but I also never said stop or hinted at the fact that it was too much for me