In laymans terms the UK was balloted on joining a Common Market not a Common Government. The Lisbon treaty (where article 50 was put in by Labour so they could bullshit the legislation through Parliament) was voted on and rejected by countries like Ireland, France and the Netherlands, before they were strong armed into voting yes.
A market does not tell you how to spend any money you make at it, else the stall holders would unilaterally piss off and organise another somewhere else. We voted for a market not governance, since we cannot be in the market without it telling us what we can do then we vote to leave. We tried reforming from the inside, but were always shouted down. Now the Germans have run everybody else into the ground via their control (look at Italy's economy pre and post Euro) and control everything (who else is making money from the EU), they expect us to be subservient as they try to demolish our last vestiges of control.
Well sorry, we voted to have our legislation under our control, our right to self determination and the right to do business with whoever we please. Should they slap tariffs on stuff we export, we simply apply the same level of tariffs to stuff we import from them, the difference can be used to help subsidise those affected by the tariffs. We voted, leave won, get over it!