In this case, doesn't the injustice work for Alphabet (not that that's just)?
Can't they just establish a "we will not negotiate with terrorists" kind of reputation, and when they see abusive misuse of DMCA, then the abuser is facing very deep pockets of Alphabet, who is motivated to make a lesson of them?
Google's current approach to copyright on YouTube was adopted following their settlement agreement with Viacom [1]. While the terms were never disclosed, that settlement probably constrains how Google can handle copyright policing on YouTube.
[1]: https://en.wikipedia.org/wiki/Viacom_International_Inc._v._Y....