You are trapped in a co-dependent relationship which damages both you and your mum far more than it helps and supports you.
I would suggest contacting your mum in writing, to give you chance to get your thoughts in proper order, without the inevitable de-railing of any conversation which will occur when she responds to your first observation.
Ask that she writes back, and ask her to be honest about her feelings, and leave out any vitriol, which is simply a distraction.
If you are serious about mending this relationship, i suggest you consider relationship counselling for the two of you - as thigs are, you simply continue to damage each other, which is futile.