It's not EU's fault US manufacturers can't keep manufacturing costs down.
Neither is it EU's fault Trump believes slapping tariffs hurting US consumers will improve US standing in the world.
Your post is yet another example of how USians don't understand how VAT works.
There is no VAT rebate on exports, there is a 100% reimbursement of VAT on any export. There is also a 100% reimbursement of VAT on any B2B sale. That way VAT is a tax only on goods that are sold to consumers in the EU, no matter where they came from and no matter where they were manufactured/processed/...
How this works as an example: You mine iron ore, sell a ton for 1000€. Buyer pays 20% VAT. But since it's B2B, buyer can get those 20% back immediately in his monthly VAT declaration. Buyer makes 500kg steel from that iron ore, sells it for 2000€. Buyer of the steel can get those 20% back, since it's B2B. Let's say the buyer makes paperclips from that steel and sells those. Now the buyer of those paperclips is the interesting thing here, because the buyer pays 20% VAT on those paperclips. He might be their end-user (either business or customer) in which case he won't get 20% VAT back. He might be a reseller, in which case he will get the VAT back. End-users don't get their 20% VAT, resellers and processing industry do. It's always only the last step in the chain who really pay VAT, everyone else doesn't.
And any border-crossing is treated as a sale, so the you get the VAT rate (different EU contries have different rates) from the country that the goods are leaving paid out, and you have to pay the VAT rate of the country you are entering on those goods. If you are exporting to non-EU, and there is no VAT in the destination country, you don't pay any, you just get the VAT back from the country you are exporting from. So it is totally symmetrical, totally fair, and totally neutral, independent from whether it is US, EU, Chinese or whatever the origin might be.
And if you think it's complicated, you might be right. But then again, look at the complete and utter mess that US sales taxes are. Every other town might have a different tax rate, system, catalogue of goods every other week. USians shouldn't complain about trade barriers as long as that mess is still in place.
> The EU enabled the Dutch Sandwich and Irish offshoring trade scams which has become a tax haven
That's a fault of Ireland and the Netherlands, the EU is just powerless to stop those practices. Same as the US is powerless to get rid of their own tax haven states like Delaware, Nevada or Wyoming. Just to cite Wikipedia, "Andrew Penney from Rothschild & Co described the US as "effectively the biggest tax haven in the world" and Trident Trust Co., one of the world's biggest providers of offshore trusts, moved dozens of accounts out of Switzerland and Grand Cayman, and into Sioux Falls" https://en.wikipedia.org/wiki/United_States_as_a_tax_haven
My understanding, dealing with VAT/GST in another country, is that a business customer still gets the VAT back even if they're the end user. If my company (which comprises of 1 person) buys paperclips, or a laptop or whatever for business use, I claim the VAT back. It's only the consumer who pays VAT. If I want to transfer an asset from my business to myself then I have to pay the VAT.