You sound very closed and passive about your DS. Like you've given up.
Two years of assessments sounds hard.
But why have you accepted you are a poor parent to him?
And why have you accepted his behaviour as normal when it really doesn't sound normal?
You detail all the things that show how he's not
You say you parent him in the same way you parent your other children. That concerns me, as he's obviously very different to your other children. Do you have specific techniques in dealing with him? That focus on his individual needs? Is it that you've given up on trying to respond to his individual needs, because you've been told he has no individual needs? Which is clearly untrue by the way! Or is it that you do actually tailor your parenting to him but now don't say that because you feel somehow bound to telling the party line CAMHS have imposed on you?
I wonder if you'd benefit from a parenting course? I'd read on here that people have found them useful even if they've been sent on one as part of trying to get to a diagnosis for their child.
Now, onto the subject of the clubs:
Why on earth would you suggest saying to the club 'there is no reason why you should have to tolerate poor behaviour off my son and I have no idea how to get him to sit still and focus myself.., '?!
Are you really thinking of saying that? Why? Because it sounds like you are saying that he's naughty for no reason and he should be treated and judged as a naughty child (& you should be judged as a bad parent?!)... Yet I don't think you mean this really?
You need to get a bit of fight back! Be your child's advocate and champion in these situations. He needs you to be there for him otherwise people WILL treat him as the naughty child who is too out of control.
Which won't be good for him at all.
It's clear from what you've said here that it's not because he's just a naughty little boy!
Why tell them there's nothing wrong when he's clearly not doing things or experiencing things the same as other children?
Just because you didn't get one diagnosis, doesn't mean to say he's not got any special needs.
You could say to them 'there are clearly issues but we haven't got to the bottom of them yet, but yes, he finds it very hard to concentrate, as you've noticed' and then you could say 'we've tried X, X and X, which help a bit, but it's still a struggle'
So, saying what is the reality of the situation but inviting people to empathise and see your child as needing extra help, not extra punishments. It also shows you won't tolerate people writing him off.
And if it seems right, you could even ask them 'so wondering what experience you have with children with these kind of sn? And whether you have any strategies you'd use for focusing attention etc '
And then you can ignore stuff that you know doesn't work, but it gets them thinking about supporting DS, and trying out different ways of helping him concentrate, beyond telling him off or excluding him.
Finally, through all your posts there seems to be this tension between you passively saying you believe the 'experts', then listing symptoms and problems that are clearly not 'normal'. So under the passive acceptance, I sense... maybe I'm imagining it, but I sense seething anger, resentment?! Probably desperation too?
That's not a criticism, it's a hope! I hope you've got some anger to channel into getting up and steeling yourself to keep trying to find ways to help your DS. And I'm sorry you're in this situation, it sounds terrible. Have you tried going on the special needs boards here? There are many people who are going through 'the system' and fighting for their child. It might be of help?
He needs you to fight for him. I know is bloody tough, but please don't give up on him.