While we come at this from very different political angles, a, I must admit that I find the spectacle of those on 'the left' supporting membership of the EU deeply baffling. You mention TTIP and, in conjunction with free movement of labour driving down wages and the fact that the thing is avowedly a free-trade zone designed to aid big business, I see absolutely nothing for anyone of the left to find to support in the thing.
I mean the President of the United States just rocked up to tell us what a good idea it was for us to do what we're told because that's what they want and much of 'the left' appears to be lapping it up and saying we should be good boys and girls and do what that nice Mr President tells us, ffs!
You couldn't make it up!