Remainers are entitled to think brexit is terrible. They are entitled to want things to be different. However, brexit is here. If remainers want to change people's minds for the future then, IMO (and don't worry, it's the last time I'll say it) then they need to stop patronising, insulting, blaming and otherwise having a go at people who cast their vote in favour of brexit. If remainers do not stop with the insults (and I don't just mean to me, this is a broader issue where many people in society feel unheard, belittled, patronised, hated, disenfranchised and looked down on) then the same may happen again (at the next vote), or at the very least change will not occur, or will.occur.more slowly than remainers desire.
No-one likes to be told "you r stupid, it's your fault, you r ignorant....", especially by people who are looking down on them and think they are better than them. Confrontation in that way does not change minds. People cannot be forced or beaten into submission. They cannot be hated into changing their mind. The more you insult, you push, you blame, the bigger the defence is constructed. The more heels are dug in. The less likely people are to listen. Minds are changed through understanding, listening and positive action.
Its not me that wants to change minds on this topic. It's the remainers. It's up to them to decide - continue to moan, belittle, be hostile (and get nowhere). Or try a different approach (based on a little more respect and compassion for your fellow citizens - more of whom voted leave than remain).