DSS is 11, about to turn 12, and just started high school after summer. He lives with us full time with other DSS7 and our 2 children we have together.
DSS 11 has always been quite hard work but it has ramped up massively since he has started high school. He speaks to everyone in the house like absolute shit, puts others down constantly, and is really rude and derogatory. He tries to control others, and will threaten with violence if his younger brother isnt doing what he wants. He will also frequently say that he is going to 'batter' anyone who has bothered him at school and often fake punches as a way of threatening or joke-threatening someone (for example if he asked DH for something and DH says no he will pretend to punch him in the face but might laugh so if DH pulls him up he says it's a joke). Saying all that, he can also be loving and thoughtful, however the difficult side has become more prevalent since he has started high school. DH and I have discussed it and DH is struggling massively with it too and they are now often arguing which can often create a really negative atmosphere in the house.
DH thinks that DSS thinks that now he is at high school that he is grown up and he thinks that he is being cool by talking how he is. I think DH could be right but I don't know how we change it, no amount of discussion seems to work. DH will give consequences but these also have minimal effect and any effect they do have is only temporary for a very short period.
I know teenagers can be hard work but to be honest it's just really horrible to be around. My younger DSS is now starting to copy some of the behaviour and language, talking down to and being negative about others, fake punching and talking about punching or battering people who annoy him, and I am terrified that our shared children will start to do the same or grow up seeing that as normal. I'm also worried about the impact that how he is speaking to them will have on their self-image and self-esteem as he is constantly saying negative things about them and putting them down. There are times when I just want to take my own children away from it because I don't want them growing up being spoken to like this, my toddler adores him and I'm scared of the impact it will have on her to be spoken to and treated the way she is by someone she loves. I don't want her thinking that it's okay for someone to be speaking that way to her.
But I know he does love her and he can also be great with her (although the negative speak is becoming increasingly the norm) I also don't want to split our family up and surely there are nuclear families where the teenager is a bit of a shit to the younger kids and what do they do? I honestly don't know what's for the best.