My ds is 17 and generally a lovely boy in many ways. We have our issues, as I'm sure many do. He can be very lazy and stubborn when it comes to tasks that he has been asked to do but doesn't want to i.e. empty his lunch containers and clean them, put his washing in the main washing basket, put his clean clothes away or keep his room tidy. He also isn't hugely motivated to try hard at school but has been lucky so far in that he's quite bright. His luck will run out though and he recently failed an AS level. General stuff but it becomes quite frustrating.
The main problem is that he constantly perceives himself as a victim. Whenever he is told off he makes a comment about how his siblings, particularly his sister (younger by 2 years), are not told off like him. He very much sees DD as the favourite child which is not helped by the fact that she is high-achieving, works hard, does her own washing and keeps her room tidy. I have told him multiple times that our behaviour towards him is a direct reflection of his own behaviour but he just doesn't seem to grasp it. He has in the past, been quite a bully towards DD - isolating her from the others, who are younger, and taking any opportunity to put her down. This has stopped though in recent years although he can still be controling with his other siblings and they get very cross with him.
Last night we had an almighty fall out. He did something to purposefully upset DD, knowing full well it would really upset her (think exposing her to a phobia that he knows she has). He did it out of pure spite. This followed on from an afternoon of attitude where DH had taken him out all day for an activity but when they got back he refused to contribute to any house related stuff. I really lost my temper with him and shouted but he refuses to acknowledge his own behaviour in this situation. Apparently it was just a joke and whenever anyone does anything to him they never get told off. My reaction was OTT but it's a built up frustration of him not completing the very basic tasks that I ask of him along with his shitty attitude when we are busting our arses to try and do the best by him. I have apologised for shouting and he has reluctantly apologised but when I asked him what for, I could tell he didn't really know/believe it.
How do I make him understand that he only has control of his own behaviour and that perhaps our tolerance would be greater if he were able to demonstrate some awareness of this? FWIW I do try and praise him and celebrate when he does well but it's hard sometimes when his room stinks the whole house out due to the rotting food he's left under his bed despite me asking him to clean it 15 times.
How do I approach this without it being another battle?
Sorry for the essay!