The non-demoncratic decision making, I sort of get but the flip side of that is the fact that significant improvements to working lives and equality have been made through EU membership. This arguably wouldn't have happened without the EU.
I think the key word here is 'arguably'. Yes, the EU brought in some improvements to workers' rights. But it has brought a lot else in. And plans to bring a lot more in in the future, including an EU army, an EU version of National Insurance, and Turkey.
Meanwhile we in the UK were having a smaller and smaller voice in the EU. The first alarm bells that ran with me were when Juncker became President of the Commission, despite Cameron and the entire UK political community against him. I kind of made up my mind how to vote after David Cameron came back with his pathetic little 'reforms'. Which the EU made a point of saying were not legally binding. I gave Cameron credit for having tried his hardest, but realised that we have no clout or influence, within the EU. It is impossible to reform it from the inside. We tried and failed. The EU is on steamtrain towards greater political integration, towards eventual sovereignty.
And if we had voted remain, not only would we be symbolically handing over our sovereignty and independence to an unelected entity, but it would have given the EU the green light to press ahead with greater, more ambitious integration. With the attitude towards the UK of 'you had your chance to get out, you chose to stay in so suck it up'.