What you're talking about has absolutely nothing to do with tracking usage of workplace computers and networks - H&M kept "excessive" (sic) records of personal

What you're talking about has absolutely nothing to do with tracking usage of workplace computers and networks - H&M kept "excessive" (sic) records of personal data of people who were not their employees at all (family members of their employees) - and the problem wasn't that they had some data because in EU you're required to keep track of families of your employees due to tax reasons, but that they had too much of it. In most EU countries, tracking company-owned hardware is explicitly okay, and where it's not mentioned in law there are judicates that make it OK. As I said, even the government and its wholly/partially owned enterprises are doing it, and working as a contractor for the government here requires you to track usage of your employees' workplace computers too, so I can't see how it could be in any way illegal. Same thing with working for banks and insurance, and I bet there are more cases.