I really LOVE my ten year old son.
I really don't LIKE my ten year old son just now.
He's being absolutely awful. I am really not well - feel a bit better today but still am just about managing to stay upright and am actually in a fair bit of pain. I did a museum thing the other day which he declared was babyish and it was a bit (for younger siblings really - Beatrix potter) but still thought he might like it. He didn't.
Unfortunately since then I've just been too ill so have had to hand over to DH. And I get DS is disappointed. But I do think
"Mum, you're not ill, you're fat and lazy!" 
"Mum, just get up," (said with a look of absolute disgust that really looks out of place on a ten year old.)
Lots of passive aggressive conversations with younger sister along the lines of OH, well, sister, it would be GREAT to do xyz but we can't because MUM is ILL.
Fuck. Off. DS.
I have told him when I am back to full speed we are having a very serious talk indeed.
(This is tres out of character for DS. I'm a bit hurt really.)
Just need a rant, as you were ...