Whether or not Brexit is a "disaster" depends entirely on who you are.
If you are upper class and wanted Jemima to go and study in Milan, before settling in Paris and becoming an influencer working for Instagram then yes, it could be a disaster.
If you're originally from mainland Europe, have settled in Britain, and were hoping your family, elderly parents, aunties and uncles could come and join you at some point then yes, it could be a disaster.
If you're middle class and loved your limitless supply of adorable, cheap, Romanian cleaners, and your highly educated degree-holding Polish plumbers and Portuguese baristas then yes, it could be a disaster.
If you're just an ordinary person, who doesn't give a fuck about any of the above, and who just wants less immigration, less wage suppression, less competition for jobs, less pressure on the housing market, less pressure on health services, primary schools and infrastructure, then Brexit will not be a disaster.
And aside from questions of self-interest, if you're an ordinary person who believes that democracy and sovereignty are important for the health and happiness of a nation - which includes a) honouring a democratic vote and b) having an actual demos - then Brexit is our only way forward.