I'm still married but otherwise in a similar situation. Interesting question OP.
I am a classic not liked / loved by her mother. I realise now she had mental health problems. I find it hard to accept that anyone likes me, I have chronic imposter syndrome. I have lots of friends, a good job with great colleagues but I'm permanently surprised by this.
At work this manifests itself as difficulty / embarrassment with accepting praise. It's almost as it I haven't learnt to accept praise because I never got any as a child.
With friends it manifests as an inability to ask for and accept help, especially with looking after my children. I think I am a bit embarrassed that I don't have any parental support like other people do.
With my husband it manifests as frustration when his own parents mollycoddle him / worry about him too much. It's stupid because they are normal parents who love their son but I find it annoying. I think it's probably a deep jealousy and I know I'm being completely unreasonable.
I don't really know how it will impact me as a mum in the long term but I do find it surprising DD likes me as much as she does. The DSs are different, they are less complex and my mother didn't have a son (another disappointment for her).
This post sounds really self indulgent, I don't think / feel like this all the time, I'm just answering the question. My childhood wasn't awful but it does have an impact on your life when your most formative relationship is damaged. Good luck with the counselling OP.