I think many farmers did realise they were supported, in part, by the EU and that they needed to trade with the EU seamlessly. Therefore Remain was the best option. I know the NFU was against Brexit but, as usual, some wealthy landowners and others said Leave was "no problem".
In every single walk of life, people who are at the coal face, and who face the the greatest risk to their jobs and lifestyle, have listened to those who have a very good life and no need to worry about anything, ever. An over-simplified argument appears to be all some people can understand and now we have to listen to "Just Leave - now!!!" It is truly worrying that this is the quality of debate and depth of understanding some people have.
I too have despaired at people not understanding the obvious. "Take Back Control" have been the most damaging three words we have heard in a generation. It is impossible to do this without chaos. It is impossible to do this without some people/firms finding it a great strain due to lack of clarity regarding trade, imports, regulations and rules that govern our lives. It is so sad that younger people will be picking up the pieces of this and many older people appear not to care a fig about them. Many are OK with generous pensions and somewhere pleasant to live.
We are not rich enough to pay for Brexit and think we will have money for all the services we need. I have no doubt younger people will be truly shafted for this decison and there is no utopia after Brexit. They already cannot afford housing, pensions and now face worse services and higher taxation than the generation before them.
Immigration has helped this country. We have not moved quickly to curb immigration because if you just look at NHS vacancies, for example, we see that we need skilled people. Many other industries and farmers are in the same position. The immigrants have families but we need their skills. We cannot do without them right now or we will be in an even bigger mess.