"Leave the EU" was on the ballot paper. As I understand it, that is what the govt is doing. Aligning the UK in the short-term with the EU is not being "in the EU". To turn the oft-used phrase round - You won, get over it.
There was nothing on the ballot about where to go when we walk through that exit door. Farage said both Norway and Swiss models were good options, Davis said "my preference would be that we remain within the Customs Union", Hannan said "nobody is talking about threatening our place in the Single Market", and so on. Now they see the reality of all that leaving involves and these statements get forgotten in an attempt to square the many circles like "control our borders" and "have an open border in Ireland".
As for "we can trade on WTO rules as all other countries do", clearly those that think this are happy to take orders from and abide by the rules of the unelected WTO instead of from the (unelected, they say) EU. Strange logic. I have yet to hear a single politician of any persuasion who seems to understand the WTO. We currently trade with just 24 countries on WTO terms (eg Argentina, Brunei, Cuba ...). All others are covered by trade deals, mostly concluded by the EU - deals which of course we will leave when we leave the EU and therefore have to renegotiate. And the only countries which don't have trade deals with anyone else are North Korea, Algeria and Serbia. Even the oft-quoted Mauritania has just joined the Community of West African States.
As for citizens' rights post-brexit, don't get me started. I have read that section of the WA in detail (pp 16-62 if you are interested), and most of the promises made by the govt in recent months have failed to be converted into clauses in the agreement, leaving EU citizens here and UK citizens in the EU still unclear about their future. For me, that aspect is personal, and I object to the prospect of my wife, resident here for 31 years, having to justify and document her right to stay and to pay £62 for the "privilege" if she is accepted.
However, it is everyone's democratic right to speak out and/or campaign against things you don't agree with, from whichever angle you are looking at it. Democracy was not frozen in time in 2016. And this WA will not get through Parliament, so someone had better have a Plan B.