I'm not against Brexit due to fear. Still, to list bad things from Brexit I don't want, I'm thinking of...
Pessimism & poverty, both Material & cultural. Insularity. Xenophobia.
Angry People winning every political argument. Merits & evidence don't matter, just who is most angry. Most Angry wins.
Difficulty getting spare parts or good quality items at good prices.
Food and products being poorly regulated, not as safe, more polluting, less durable, less fit for purpose.
Loss of high standards (business, science, politics, law)
Mob rule. Judges being called The Enemies of The People because they followed legal principles & due process.
Regular bombs in London again due to The Troubles.
Poor pay, poor equipment & facilities in the public sector due to declining GDP & tax revenue (me, DS & DD all have or will have jobs in public sector).