You are SO not alone! LOL
My (now) 14 year old hit puberty early, I'd always said I was dreading it and boy was I right. She is one of the most hormonal teens I have ever met! Horrible to her younger siblings, cheeky and loud with us. slamming doors, yelling and gawd help us the week she's 'on', that is the worst ;)
Thankfully, she's a sensible kid and knows that most of her mood swings are down to her age and hormones, so a lot of the time she will just say 'Leave me alone, I'm cranky' then she'll sit watching tv with the headphones on (even when we're all watching the same thing lol) and we just leave her to it until she's feeling better.
We respect her need for peace, and she respects us enough to apologize for her behavior and be nice for a couple of hours ;)
As for dinner/tea, she eats whatever I make and if there's stuff she doesn't want she leaves it and grabs a snack later.
All in all I'm glad we're going through this stage so that I can (possibly) be better prepared for when my youngest, now 7, gets to that stage.
Now if only I could figure out a way to get the 14 year old to stop wearing MY clothes.......