Democracy isn't about making a decision for better or worse, we weren't asked this is the bad decision and this is the good one and here is the evidence so take your pick. No-one picked the right or wrong decision because that is a matter of opinion and perspective. There is no evidence we will be better or worse off just yet and that information was required before the referendum to have any point or weight. Saying we should have another referendum because this is a bad decision for whatever reason takes the whole point out of giving people the choice a year ago.
As I said previously, for some this was not about results it was about being able to do things like gain the 100% ability to make our own laws and be in control, you cannot argue that leaving the EU does not achieve what those people voted for. That is surely a good thing and for many it would of been the only thing that mattered so you simply cannot say that for those people it is a ridiculous decision.
Your opinion on whether this will be bad for us is no doubt linked to the economy and what the power brokers in the city constantly tell us but they represent 7.2% of the take. In my mind I think for many of the real businesses it will be better, it means the UK can do business for the benefit of the UK and not the EU. Look at the US, they can make laws and orient themselves for their own benefit, it is why the US has lodged 200+ WTO complaints for it's companies whilst we aren't allowed to lodge any. Is it beneficial that we trust a Frenchman or Dutchman to work on behalf of us??
Leaving means we are able to change the country so that the company I work for can compete at an advantage compared to those in Europe. Our best market is Europe because of the trading conditions indeed but Europe is potless. If we could sign deals abroad we would do far better but we can't, this is why the majority of our trade is with Europe, we simply have no choice.
It isn't all bad, it will be to some degree for companies who trade with the EU but that isn't all of them by any stretch of the imagination. As a large economy what disadvantage do we have to being in complete and total control of how we do business with others? I don't think we will do better in the short term because it will take time but in the long term, who knows?