I am so sick of talk of winning and losing, or admitting defeat.
This is not a game, it is something that a lot of older people have foisted on a lot of unwilling young people, who bitterly resent it. It has soured relations between the generations, probably for most of our lifetimes, and, as such, will impact on the old age of many, many people, and will have a huge impact on people who were too young to have a say in the referendum.
It may or may not turn out to be as bad as a lot of people fear, but it is incredibly dismissive and contemptuous not to at least acknowledge that those fears exist, and are very real for those who hold them.
It doesn't matter whether Remainers accept the situation or not. We are having it thrust upon us against our will, and are expected to sit back and see the UK split up, and our EU citizenships nullified.
If there had been a referendum for making the UK a communist republic (or for banning the speaking of English in favour of Esperanto, or enforcing euthanasia on the over 70s) and the other 'side' got more votes than you did, would you say nothing and refuse to try to alter the situation for reasons of democratic principle, or would you keep trying to get your point of view across until the very last minute?