VAT complicates the business environment for US companies operating in the EU, and it takes a major chunk of their margins. US doesn't have VAT and has a significantly easier business environment for EU businesses to operate in - leading to an unbalanced playing field.
VAT is just one component though. Remember that US largely subsidizes and sponsors the defense of EU, Ukraine, Taiwan, Japan, etc - but those countries have been giving less and less back, over the past years.
VAT complicates the business environment for US companies operating in the EU, and it takes a major chunk of their margins. US doesn't have VAT and has a significantly easier business environment for EU businesses to operate in - leading to an unbalanced playing field.
VAT is just one component though. Remember that US largely subsidizes and sponsors the defense of EU, Ukraine, Taiwan, Japan, etc - but those countries have been giving less and less back, over the past years.