PlanetsCentral

Then why didn't you mind at all when 1-4-6 players in the Titan 23 game killed one pirate with them in the company of 7?

The very simple answer is: I was not aware! I was busy to stand my ground against Fascist and Borg as well and my knowledge about the rest of the map was very limited.

It seems however that you have chosen your fate on your own:
According to some information I was able to gather you and the Rebel have attacked both Borg and Fed so you can't blame them for striking back together with their 3rd ally, the Fascist. The Crystal was simply running out of enemies in his own corner so he must have joined the attack independently.

In the end, even if you were beaten by an alliance of 4 (and I strongly emphasize the subjunctive!) I can't see any right for you to complain about a situation that you and your fellow citizens are causing in virtually every game you play...