Having the country run by basically unelected bureaucrats
Which unelected bureaucrats are you referring to? Which MEPs were unelected?
who won't give a damn about the UK
Oh, but oddly - they do.
You see, when UKIP boys voted to remove British protected fishing zones and actively supported allowing French and Spanish armada access to UK fishing waters, it was the other countries that stopped it and made sure interests of British fisheries remained intact.
Given opportunity to speak for British industry, when Nigel Farage was made a member of the European Fisheries committee for three years, he turned up to only one of 42 meetings, left half way through the plenary vote and then promptly resigned (from all Committees). Few months later he used both of the above as an example of EU attempting to "decimate British fishing industry".
Nigel Farage set up an offshore tax evasion scheme for himself, so its no surprise that when EU parliament voted for measures tackling tax evasion schemes, UKIP voted against it.
When EU parliament wanted better protection for holidaymakers buying package holidays abroad, UKIP voted no.
When EU parliament wanted better public access to EU documents, UKIP voted against increasing transparency.
When EU parliament wanted to improve protection for the regional produce, (basically preventing vendors to outsource "Newcastle Brown Ale" or "Stilton Cheese" to the cheapest foreign bidder), UKIP voted against it.
When EU parliament voted on EU motion to clamp down on wildlife crime and the illegal ivory trade, UKIP protected interests of poachers by voting against those measures (6 out of only 14 votes against).
UKIP also voted against safer lorries. Supported female genital mutilation by voting against zero tolerance resolution ( 7 out of just 13 votes were UKIP). They voted against equal pay for men and female workers. Voted against combating violence against women and marital rape. Voted against the removal of asbestos from all public buildings within the next 15 years with Steward Agnew claiming in media that white asbestos was "harmless". Voted against scrapping roaming charges within EU from December 2015. The list goes on.
Basically, if there was ever a common sense vote, that UKIP managed to attend (they do have highest absence statistics in EU parliament) - they would almost certainly oppose it. Each time other nations bailed you out.
and use us as a dumping ground for immigrants
You need to go back to wikipedia and read up on British immigration history, because the "closed door" policy you so yearn for, never existed. Also, immigration from outside of EU always far outweighed EU migration, and since UK is not part of Schengen agreement, it was always controlled internally. In the simplest words I can manage - it's a choice, not EU "using us as a dumping ground for immigrants".