DS1 is 8 and over the last year we have seen a big increase in him struggling with frustration/anger at home. He seems to overreact to so many small things and it's getting out of hand. we have 3 other DC aged 5, 5 and 2.
The bulk of the issues are between DS1 and DD1, constant niggling and winding each other up which has now progressed to him reacting to everything she does as if she's deliberately trying to wind him (maybe she is, its hard to tell). He growls/screams at her and can get violent (low level, kicking/hitting out once rather than full on beating up).
He really struggles with doing as he's asked first time and then he growls/screams/stamps his feet at me when i take away privileges when he hasn't done as he's been asked.
Example: Yesterday at 4.30pm i asked all DC to tidy their playroom. Spilt the room into thirds so they all had their own bit to sort (to save arguing). Half an hour later DS2 had finished but DS1 and DD1 were mucking about. So i told them both they had lost their 'daily challenge' (for good behaviour, reward chart thing). DS1 growls, stamps and shouts 'it's not fair'. i calmly reiterate he needs to tidy up and if it is not done in the next half an hour he will lose his game time before bed. it isnt done, so i tell him he's lost the game time. more growling and screaming at my face. I naughty step him for screaming at me and then send him back to tidy, warning him that he will also lose his reading time for any more bad behaviour. i go back in, room still not tidy so i tell him he;s lost his reading time and he loses it in epic style.
Once he had calmed down and the others were in bed i had a long chat with him (again) explaining that he couldnt behave this way and that my job was to teach him how to behave properly and as he didnt do as i asked, i had to take away something he enjoyed. Tried explain that the reason he lost his game time and reading was because of his behaviour but he wouldnt accept it, just kept telling me it was 'not fair'. I gave up, put him to bed and told him i loved him.
So what am i doing wrong? how else do i get him to understand that he has to do the jobs i ask him to do and that shouting/screaming at me is not acceptable behaviour?
the rest of the time he is wonderful, very clever (genuinely) and good fun. he gets one on one time with me and DH every night when the younger ones are in bed, he is excelling at school and they have no issues.
i'm at a loss of how else to handle this.
So WIBU to keep removing more privileges? What should I do instead?