DS6 is coming to the end of Year 1, and he is incredibly argumentative.
He claims to know everything and always be right, and if he says something which he then realises was inaccurate he will backtrack/lie about it, despite the fact that we openly own our mistakes in our family. He also behaves like this when he unreasonably demands his own way.
We try to calmly discuss this with him and then he starts shouting, crying, saying thay no-one loves him, and that we're horrible. He even hits us from time to time.
Not helped by the fact that DD9 is very timid and well behaved, meaning that she is rarely in trouble, which DS6 sees as unfair, and she also kowtows to his bloody awful behaviour. I feel bad for her.
These outbursts probably happen two or three times a week and we're exhausted. AIBU to ask you wise Mumsnetters for advice?