I've heard you say this quite often and I disagree. Although the economy was a big part of the argument (which is proving true, especially for the poorer regions), there was also the social protections offered by the EU Social Charter - which I still don't think people fully appreciate the significance of the threat of losing it. There's the huge uncertainty we've plunged ourselves into. And of course, whichever way you want to look at it and argue about it, the EU has brought peace to main parts of Europe for over 50 years - the longest stretch we've ever had!
I totally agree that the Remain campaign was shocking, and instead of relying on the facts and talking to people as rational people they tried to match the Leave 'Project Fear' and kept pumping out propaganda to counter propaganda, and all they succeeded in doing was turned people off, they failed to engage, they slagged people off. It was awful. Cameron thought he could bully and scare people into doing what he wanted - as he did with the Scottish referendum.
The problem is of course that Leave went in with No Plan, a handful of lies - Immigration - a lie, £350m a week - a lie, more money for NHS - a lie, and as soon as they won, the architects, instead of putting a plan forward to sort out the mess, they all just ran and hid.