Do you all have a 'relationship" with him that is not based on good or naughty behavior?
He is a Tween. Tweens are from 9-12 years old. If you do a Google search on "Tween development"... many articles will come up.
At this age, BEFORE he hits the teens, it is important to have a relationship with the child... knowing him, what his interests/passions/problems/thoughts/ideas/dreams are. IF they feel connected with... this will sometimes improve behavior in a child.
Many times, kids are at the receiving end just getting punishments and getting scorned or judged. But what they are 'missing' is Camaraderie AND a "RELATIONSHIP"... with their Parents... and feeling accepted/heard/felt/respected for who they are. COMMUNICATION then improves, not it just being a 1-way street.
Also, what is his Dad doing with him/about him/with him????
Him appearing to be pissed off at the world, to me, indicates a kid who does not feel he can express himself, or he does not know how, or he feels he is always at the short-end of the stick, or not being understood... etc. Common 'Tween' or "Teen" attitudes.
IF he can be mature, and act it... and develop a mind-set of being more mature... then he has to prove it... and also in relation to his parents. THEN maybe that way... he will feel more accepting of himself and others. And more in control... of his behavior. But also, hormones and this age stage... can be difficult.... but they need to know boundaries.
Maybe you ALL sit-down with him, have a "family meeting" and use it to explain things, what the FAMILY is doing and expecting, not making it just a time to scold him... but incorporating him INTO... the expectations of what is expected.... and what a FAMILY is and how HE needs to HELP TOO. Give him chores. Make him productive. Have him sign a 'contract' about his behavior and what 'he' can do to improve.... etc.
Since he is always so pissy about everything, ask him why? THEN tell him, he can either be a pissy person, or a pro-active person, who makes things BETTER.
TEACH him HOW TO PROBLEM SOLVE. And in doing so, that will help to make himself.... feel better.
Maybe find something he can do... to feel better. Volunteering? What are his interests?
Who are his friends? Let him invite his friends over....
Learn ABOUT him.... and then go from there.... at this age, having a 'relationship' with their parents, is real important for a kid. Not it just being punitive based.
Encourage communication with him... so that as he gets older.... you will all know, what he is doing, and so that he WILL come to you, for anything/any problems/ideas etc.
all the best,
Susan