The most effective way to fight this might be to build consensus around a less criminally insane way to do this.

There fundamentally is no less criminally insane way to do this. After WW2, there was a consensus in germany to not surveil its own citizens (as had happened during the Nazi times). This EU proposal goes starkly against that, and seemingly ignores all of the other blatant problems. The EU commission gets paid a shitload of money per year sothat they make meaningful proposals. This is hardly it. They need to prove they're worth their salt by doing basic thinking and figuring out that such a proposal as is now on the table is not even worth being discussed, it should be discarded immediately.