I'll be honest, I'm really struggling with my Daughter at the moment. She was 10 in July.
I'm expecting to be told it's hormones, well almost hoping, but I can't help but worry.
She just seems so so angry and unhappy. 
She is good at school, reasonably popular within a lovely group of friends, well behaved, almost always does as she's told and apart from the moods, is pretty much an angel.
She has a younger sibling & I've often wondered if maybe some jealousy is starting? Myself and DP (not their Dad) try to keep her involved in everything, but a lot of the time she will just go "too far" & ends up ruining the game (just an eg.) or going too far with rough play, gets told off when she's hurt somebody & ends up stating how much she hates her life & saying we hate her etc.
What am I doing wrong? Is this pre teen behaviour? I'm more scared that she's going to end up feeling the same way about me that I do about my own mother. I'm constantly fighting with myself questioning if I'm over compensating for that & creating a "brat" or if I'm being too hard on her & making her hate me.
I genuinely get the impression that she dislikes her life & cant help but blame myself.
The majority of the time she really is a lovely girl & I wonder if I'm thinking & worrying too much. What can I do? We have a great relationship, (I believe, mainly in comparison to friends & their daughters, or especially my own with my Mum) but I can't stop having these niggles that I'm not getting it right.
Can anyone share any of their own experiences? Is this normal? What can I do to help her?