Honestly? Eastern Europeans, of all people, got massively subsidized by the EU. Biting the hands that feed you is a great recipe for building resentment and mistrust, which brings conflict and ultimately war.
Wouldn't a voluntary exchange of trade, labour and policies, in place of "a feeding hand" (what a condescending remark!) be better for everyone?
By the way, the subsidies feed mostly the politicians, and the hands of their well-connected friends who are the true benefactors. And that's no coincidence -- as I said, we've already lived through the reality disconnect that is the result of top-down social engineering.
What the linked poll shows you is that normal people are telling you to take your oh-so-generous subsidies and shove them. If it means being part of a political union they have no say in.
Sure. The squandering of EU subsidy money on nonsensical "well chosen" projects is hardly a tinfoil hat conspiracy. It's been covered by most major media in detail [0].
Regarding businesses: what about them? I happen to run a business, and dealing with EU partners and clients is actually a (marginally) greater nuisance than non-EU partners and clients. Are you aware of the complexity of the inter-EU VAT regulations and laws, especially for SMEs? [1]