I think in cases like this it is reasonable to tag curators in a flag and provide links to some of the other copyright flags to make the case that a user who is uploading massed quantities of copyright infringing images should be suspended to prevent continued uploads. Curators and staff can make that call.
However, even for curators, there’s no way to bulk mark copyright infringing images - they still need to be flagged “manually”. I usually get tired after 30 as well, but may come back another day to knock more down once I recharge some. So I don’t think your effort in flagging the offending observations is wasted. Inefficient, yes, but definitely valuable.
I will also note that some curators do monitor for streams of copyright infringement flags, and, when they notice them, chip in to flag observations from those users. Nothing official on that, just a behavior that I’ve seen and sometimes participate in myself.