I'd love to be proven wrong, but if you look at the areas where Britain does do very well and therefore might contribute to our global success, they nearly all want to remain in the EU. Financial services want to remain in the EU, academia wants to remain in the EU, business groups from the CBI to the IoD want to remain in the EU, the tech sector want to remain in the EU, and it's not a flimsy majority that think this way, but typically around 70% of these sectors want to remain.
Yet blokes like Methusellah not only think they know more about what these key sectors need to succeed than they do, but have the quite frankly staggering lack of self-awareness to then blame those sectors for not making Brexit a success for them.