People are listened to, and engaged with, but when its the same reasons they come out with, and the counter points to these reasons are explained, but they get trotted out again it becomes frustrating.
The arrogant experts that turned off so many voters? You mean the ones that have so far been proved to be correct? For all the cheering of the recent economic data it simply corrected a massive fall after the vote, and we've had significant stimulus since then.
Your point about posters on MN, they don't bother to post, mostly cause they either find that their arguments for leaving don't pass muster, or as in the case of a good few of the most ardent leavers prior to the vote, they were obviously being paid to post.
You keep repeating this point about an echo chamber when its nothing of the sort and the confirmaton bias is shown on a far grander scale when the leavers come out congratulating each other on their posts, but fail to respond to anything that challenges their view.
You for example keep repeating this point about the EU being one rule fits all, when it wasn't and there are many clear examples of exemptions being made. You also say about "uncontrolled immigration" into areas with fewer job prospects when immigrants tend not to go to these places.
I'll stick with the North East as an example, the non UK born population of the North East rose by 60% during the years 2001-2011 and this sounds like a huge amount, until you realise that even with such a large increase this only makes up 5% of the population, or about 130,000 people in total who are not UK born. You can't say that freedom of movement has negatively effected these places, because they haven't got a sizeable enough proportion of a population to have had a detrimental effect.