Hi. Have been following thus thread with interest as I too have a toxic teen dd nearly 14.
We have a bad relationship....she says she's like she is because of me....I'm like I am because of her....so it's stalemate
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You name it...I'm it! Annoying, nagging, weird, over protective, boring, insignificant, wet (she frequently has me in tears)...I've even had ugly. She says I make her feel so awful and she can sometimes be very dramatic intimating I make her life not worth living 
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She's plain obnoxious and entitled the majority of the time. She's rude, vile, doesn't listen, goes off on one if she doesn't get her way....basically doesn't give a toss about anyone but herself. Si i do get cross, am prone to shouting as I'm so frustrated..that gets met with shouting back and fireworks all around... doesn't work but gets it out if m6 system a bit! If I stay calm and point out her shortcomings in a controlled way I get accused of assuming I think I'm so 'cool' and 'clever...can't win.
It's hard feeling so hated. I'm struggling as I was bullied badly as a child. It sounds pathetic but I almost feel bullied all over again with the hurtful comments and I have that familiar feeling of trying to please and make friends only to gave it all thrown back in my face...I'm feeling that rejection all over again....from my own dd it's awful.
Sometimes I think it's my fault she's like this with me.. she's always been a handful and I've always been a bit strict with her....maybe she resents me. She told my MIL she finds me hard to get on with
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I wish I could connect with her...I can't get near. I get the occasional heartfelt I love you.. but Jeez, the crap in between!!
She's also glued to her phone EVERY WAKING MINUTE.. this worries us greatly....she hates having it removed and I don't want to make her hate me more but we are going to have to intervene. If you remove it she literally doesn't know what to d9vwuth he4self....it's an addiction.
Just had to write that down...i know my story isn't as awful as some....good luck to everyone xx