A lot of us (leave voters) are uncomfortable with the level of sovereignty being pooled. We want to decide our own rules/regulations, fishing quotas, environmental standards, trade policy etc. A lot of which we can’t do under the EU, we don’t mind being part of shared schemes, common defence strategies etc. If it was simply free trade and some cross country co-operation then it’d be fine, which is what it originally was meant to be.
I, like Tony Benn, think the power has shifted to far from the people and the EU is a symbol of that. People in distant places holding power that should be at a local, or country specific level