I think you are missing the point that this vote is purely* about our protecting our borders.......
Yep, you seem to be right:
Loss of sovereignty.
Deep democratic deficits.
A ridiculously expensive and intrusive bureaucracy.
The European Court of Justice.
The Common Agricultural Policy and the Common Fisheries Policy..
The EU is an inward-looking organisation with huge trade barriers and protectionism, in long term decline, and burdened with a currency which doesn't work with the disparate economies without deeper political union, aligned taxation etc.