We voted to leave the EU. That means taking back control of our own laws, own borders and  our own sovereignty.  
That is what we will do, and we would like to stay in the single market, but the EU have said we won't  be able to. So if we remain in the single market, we will lose our sovereignty  by default. The EU are saying you can stay in the single market , but you can't  control your own laws, borders or sovereignty.  So we will  control our sovereignty, which is what we voted for, after all, that is what leaving the EU means, regaining sovereign control and being represented by people who you vote for, not by people you don't vote   for.
We will be left to make the best trade deals on an individual  basis, not because we necessarily  want that, but because that is the threat from the EU. Trade with us and we will control your laws, borders and sovereignty. We voted to break that yoke, to regain parliamentary  democracy. That is why I disagree with leave voters now, wanting the EU to be tough on the UK, not only did you vote against our direct sovereignty, you keep supporting an EU which is openly  trying to punish the UK.