ď...Is it that difficult? What I mean by those who voted leave comprising 35% of the adult population is that those who voted leave comprise 35% of the adult population...Ē
The Ďadult populationí is a lazy use of words in this context. It includes those ineligible to vote at the time (EU citizens etc).
Secondly on these figures 35% is incorrect
United Kingdom European Union membership referendum
Should the United Kingdom remain a member of the European Union or leave the European Union?
United Kingdom (including Gibraltar)
23 June 2016
Leave 17,410,742 51.89%
Remain 16,141,241 48.11%
Valid votes 33,551,983 99.92%
Invalid or blank votes 25,359 0.08%
Total votes 33,577,342 100.00%
Registered voters/turnout 46,500,001
I make no comment on your other points which appear to have been written in a stressful frame of mind.