Britain has never received funding from the EU. Britain just receives some of its own money back. Britain is a net contributor to the EU budget - but, thanks to Brexit, won't be for much longer.The main issue in integration has been the Euro. Countries like Spain, Portugal, Greece and the poorer regions of the UK, Germany and France have benefitted from EU funding. Some countries such as Ireland have become wealthy in part due to EU regulations. this caused the Celtic Tiger, and they've recovered well enough post-Great Recession.
The single market, or Schengen, or labelling of products, or scientific exchanges, work pretty well. The Euro however was ill-conceived from the start.