W.W.
L.
Ahhh....the age of "Independence"!!! About nine is when my kids copped an attitude and felt they were smarter than their dad and I! We told them if they felt they could do it better, please do - show us how. When they realized they couldn't? Well, their attitudes changed.
What I can tell you is the more you push and demand change? The worse it will get. This is NOT the hill to die on. When he cops an attitude? You tell him he can go sit in his room until he can speak to you like a young man. NO Electronics. NO TV. It's not a fun time. He can contemplate his navel. Go in after about 10 minutes and ask if he can talk like a young man yet? If the answer is still copping an attitude? Then say - let me know when you are willing to talk like a young man. WALK AWAY. DO NOT fight with him. Do NOT give him an attitude back.
You be the role model and keep calm. BREATHE mama!! You've got this.
If you can move him into his own room? Do. Six years is a big gap for kids to be sharing a room now. Especially as he reaches puberty. He will need his own space.
Good luck!