As ever, I feel half of the gripes about the EU apply equally to the British state in isolation too. We have masses of unelected bureaucrats, and much worse, in my opinion, over representation of private sector parties in policy think tanks, and private sector consultants influencing governance in the public sector. Anti-bureaucratic sentiment is one of several 'antis' driving Brexit, no matter how much supporters like Bruce package the whole thing as positive and forward-thinking change.
I'd have a lot more sympathy with the Brexit camp if it prioritised sensible solutions for specific issues and preached leaving the EU as secondary or complementary to that. Like, for example, what decisions and policies have they specifically disagreed with, and could it be done a better way for the general good of the population (and not purely to benefit the critics personally)?