Sounds very workable.
I'm assuming you speak English. Do you really think there's any lawyer in the EU, competent to litigate EU law, who doesn't speak near-fluent English?
(Actually, if the lawyer is from continental Europe, and you only speak English, they do speak at least one language you don't, but I'm guessing that's not what you meant.)
On that token, have you actually at all looked into how "proportionate" is interpreted legally? After all this isn't new and there are a vast number of regulations using the same legal language. Yet somehow business in Europe has not stopped. So prima facie your concerns are absurd, you have not brought evidence that there is an issue (or anything at all unprecedented really) and I have to wonder what motivates you.
As others have said, if you have no interest in complying with laws that protect my privacy, then it's appropriate for you to not do business here.