Boy, Bliz, you are going to fall over, but I'm agreeing with you again (this is, like, twice in the same day...)...
That 6 year old is one ticked off little man, and honestly, he has every right to be. His parents split up--the home he SHOULD have had was ruined--and then dad goes and brings home a new mom, one that the 6 year old didn't get much to say about, and now everything's supposed to be different.
Yet ANOTHER upheavel in a childhood full of upheavel.
I don't know if it is possible for you or not, but if you can do your best to see things from the 6 year old's perspective, it may help you a little bit--at least in learning to understand him, perhaps. He's not trying to make your life miserable--it's just that his life IS miserable, and he doesn't know how to deal with it because he's only 6!
All the things that should have been laid into his young foundation--the cement of STABILITY, of TRUST, of FAMILY, of LOVE, of being SAFE, of being WANTED--all those things didn't get poured. Instead, he learned that family isn't stable, that it isn't to be trusted, that there is no such thing as a warm loving home (what's that?), that he isn't safe, that he isn't wanted...
These are the things that this little boy has learned so far, and they aren't things that are going to go away over night (nor should one expect them to do so).
It took years to break him to pieces, and it will take many more years to put him back together again.
If he sees you as someone who just wants him to behave
so that you can go on about your life, then he is going to hate you...because you will just be yet another adult who really doesn't give much of a flip about him.
But if he sees you as someone who actually WANTS him, who actually cares about him, who will actually LISTEN to him and spend time 'hanging out' with him (doing stuff that he considers of value, whether it's reading stories or building with lego's or whatever), then his heart toward you is going to slowly (slowly!) thaw.
You are not allowed to spank him right now, and honestly, I don't really think that would be a good idea just yet. Just because you are married to his dad doesn't make you his mom (you notice, you still call the child, "
his son," not, "
our" son), that's a thing that takes time, and something you will certainly want to be praying for (a mother's heart towards this child)...and yes, Dad needs to be doing a better job of letting his son know what is and is NOT acceptable behaviour!!!..but in the meantime...
...I bet you
WOULD be allowed to come up with some sort of
REWARDS system! Maybe a chart on the fridge where a sticker can be placed every time he does what he is asked, or every time he helps with a chore, etc...
You could come up with a deal (be excited, make it fun, and do it
WITH the child)--when there are 20 stickers on the chart, you will take him to the ice cream parlor for a cone, or you'll give him 5.00 to go spend at the toystore, or...whatever it is that he's really into...

That would be a great way to discipline positively, and it would also provide a bit of incentive for him to stop unruly behaviour--throwing a fit means no sticker, yelling at you means no sticker, etc...
I would also advise you to do your best to remain uninterested/unobservant when he is disobedient. If he's throwing a fit,
just walk off and ignore it. Part of the fun of a fit or a screaming-fest is the fact that it really ticks the authority figure off. If the authority figure acts like he/she is bored and goes off to do something more interesting, then it's not nearly quite as fun!
I'd do my best to spend as much POSITIVE time with him as possible--to include him and 'hang' with him as much as you can--sounds like he really wants some loving attention---and come up with some sort of 'creative' way to reward his good behaviour, until you are allowed to deal with the bad.
Warm Regards,
Molly