> But basically a bunch of MEPs just didn't think it was that important to pay attention to the details, phoned it in, and screwed up badly.

Indeed. Epicenter.works published a table[1] to make it easier for people unfamiliar with the voting system to follow along. It uses the same template that the MEPs use, except with the "Vote" section filled in from the perspective of someone against Art. 11/13. This might make it easier to understand why this mistake could happen but it seems clear enough that, if you're actually paying attention, you could avoid mistakes on such an important issue.

[1] https://epicenter.works/sites/default/files/copyright_dsm_fi... (PDF)