'Make the best of it' is indeed a very simple concept but you don't explain how that might apply to an unknown, uncertain future for many people in this country. Your language comes across like a 'shrug' when it comes to other people's poor employment prospects; and I must also call you out for using emotive language like 'bleating'. People suffering from this aberration through no fault of their own or choices they made are not 'bleating' when they point out that Brexiter' promises have not been delivered.
I assume you are confident of being personally unaffected by the decision to leave the EU, but your stoical comments about the impending suffering of others are frankly disingenuous to put it very, very mildly.
You need to climb off of that saintly white charger you think you are riding. Those who actually have lost their jobs I have every sympathy for, those who are whining about what might happen need to concentrate more on finding what positives there may be from Brexit.
As for being personally unaffected? You could not be more wrong, I took a massive financial hit when the referendum happened, but I had no choice but to cope with it.