LadyRataxes yes, someone did. His name was Jeremy Corbyn.
"He needed to stand up and say that yes life was shit for the unskilled working class now but it wasn't caused by the EU and that there are problems with the EU but nothing compared to the problems without it."
That's exactly what he did say. His campaign was called Remain and Reform. There's a link to a video of him launching it in that Telegraph article I posted above.
Whether he didn't say it well enough or often enough, or whether it wasn't covered by the right-wing and anti-Corbyn media when he did, is a matter for argument. I personally would guess it's a bit of both.
However, he did say it, and he did believe it, I'm sure. His position, that he didn't think the EU was perfect but he wanted to stay in and reform it, was arguably a lot stronger and certainly more honest than the increasingly desperate, preachy scaremongering of Cameron and Osbourne - which didn't play very well at all, clearly.
But right now, Corbyn is a highly convenient whipping boy and this false narrative, scapegoating him for our exit from the EU, is gifting the right-wing media a way of not having to print any actual facts about the lies of the Leave campaign and Cameron's failures.
The Leave voters were all sold the dud of the century by Leave. Are we seriously going to fall for another one right after?