I wouldn’t normally suggest making an ultimatum but from your updates op, it’s obvious that your dh has a serious addiction. You need to make your mind up about where your boundaries lie op and how you want to respond to this. Imagine this situation staying the same for another ten years. Would you be happy with that?
Even though it’s not alcohol or gambling, this addiction still impacts hugely on your quality of life and that of your dc. He is failing as a husband and father.
Most addictions are about avoiding some problem. So what is your dh running away from op? Childhood trauma? Family life? Depression? Anxiety?
It’s time to have yet another serious discussion but this time say that you are unhappy (use “I” statements). Tell him that you you will be considering a separation if things don’t improve significantly , say by the time the dc return to school in September, as you can’t see this situation improving. You are fed up of only spending proper couples time together a couple of evenings a month, and always on his terms, and of always coming second to a games consul.
Ask him to rate himself out of ten as a dh and father. Tell him his children are waiting for him to step up and that you are not prepared to sit and watch him become more unhealthy and withdrawn from family life and that you want to live in a different way. Ask him if he thinks he is setting a good example for his dc?
And how about asking him to come on holiday with you and the dc this year and leave all the gaming equipment and tech behind? And if you are not going away this year, you could suggest a gaming amnesty during the school holidays of at least a fortnight?
You can get further help and information here:
https://www.cnwl.nhs.uk/national-centre-gaming-disorders
If he laughing when you bring these issues up op, and when you suggest these sorts of strategies, I am afraid that indicates he is either in denial, arrogant, selfish or a combination of all of those things. He can’t have it both ways and expect you all
be around him and then ignore you! Actions speak louder than words op and he is demonstrating that you and the dc are low down in his list of priorities. And you are not obliged to accept that as the status quo.