You can take it up with the moderators of this Lemmy to make it a rule. Or even better, to get other media to pay as much attention to EU politics as Politico.eu does. Because that is simply the reason people post links to Politico: it does a job that most other media do not. And for the most part it does it relatively well. You are otherwise welcome to shut up. I for one will not stop posting Politico links on matters that I cannot find other media articles on. And will keep reporting your spam about it as spam since that is what it is. It adds nothing to the conversation of the matter at hand.
Also, if you want to enjoy a leftist echo chamber, you could head to europe@lemmy.ml
Even better would be for them to go and find coverage in non-Springer outlets and post it instead in case a Politico link is posted. Now it is just all noise and no signal.