I can't remember a single time where people weren't moaning and whinging about whatever government happens to be in power - like they could somehow do a better job themselves! It's as if they get all caught up in a Jerry Springer-style shouting circus and just repeat what the gutter press says like brainwashed sheep.
That resonated with me massively!
Recently we had some protests in our area about wind-farms and pylons and because I was deeply involved in local politics, the pressure groups came to me to ask for help.
They were completely shocked when I told them that if they were to join a political party of their own choosing, they would get far further and have more influence, than if I raised their issues at some policy committee meeting. Despite being the chair at many of these binges, at any meeting, mine is just one vote amongst many.
People moan and complain about this or that policy, but are not prepared to get involved. I once (ages ago, before we made things more democratic) attended a committee meeting where five of us, yes, just five of us chose which of three candidates were to be our next MEP. Anyone of our members could have put themselves forward as a member of that committee and any one could have put themselves forward at candidate for MEP.
But just three people were prepared to put themselves out there as MEP candidates and only five were prepared to drive 30 or 40 miles to some hotel backroom to interview the candidates and pick one.
If you get involved in the political process, you can have enormous influence. But you have to get your sorry arse out there and get involved. If you did not campaign for remain or otherwise did not contribute to the remain campaign in some manner, as
@simon field says, suck it up!
I even meet many people, especially the young who complain bitterly about Brexit and the fact that they will no longer be able to work or study in other EU countries, who admit that they didn't even bother to vote!
If you are politically inactive, you only have yourself to blame.