What frustrates me the most about the GDPR is that a single person building a mailing list for a $19 ebook launch is just as affected and burdened as any other company. A side-business that might make you $30,000/yr is now no longer worth pursuing because of the costs of working with a lawyer to make sure you are GDPR compliant and have all of the right policies in place.
It raises the barrier to entry for small one person businesses even more, forcing out anyone who can't justify the costs of compliance.