I have nothing to add regarding game mechanics, because I have a mere 10 hours in this game so far. I just wanted to say how much the very existence of this thread, describing this very issue, scares me. Far more so than any "pirates farming each other" or infinite money exploit thread ever could.
I seem to recall this very issue completely ruining PVP in a certain previous game, where entire groups of heavy warships found themselves unable to defend their ports because the enemy attacked in superior numbers, and had for each group set aside one or two small tagging ships, who would do nothing the entire time but attack the large group on the OS over and over to prevent them from attacking their own groups who were raising unrest. The game moved from big groups with heavy ships deciding the outcome of a port flip very quickly to who could keep the other side from playing the game better by tag-wars.
Bonus points for forcing them to sail to the escape point for 20 minutes by constantly tagging them with long guns, so by the time they got out, the whole thing was over anyways.
I stopped enjoying playing "Tag" around 25 years ago. I'm sure not one of you would be willing to spend an hour in a yard, playing Tag. It's a game for small children, yet grown men seem to be fine playing it in a video game.
I'm not sure what everyone else here is for. I know some are here to read that single line of text saying "you won" as often as possible., with little regard of how they won. The pure mass of player migration from that game to here basically ensured that.
I remember 6vs6 or 24vs24 fights to be the some of most fun I've had in a video game, and I remember how a 5 vs 24 with the defenders sitting AFK in the fort while the attackers waited an hour to take the town being the absolute low point of entertainment I've ever had in front of a PC. Or the opposite, defenders with a full fleet being forced to wait for 2 hours for the battle timer to pass because if they all left, that one ship the enemy brought would magically take the town even though there's no chance the player could pull such a feat - it swung both ways.
So I can only speak for myself. I'm here for fights where I can't tell from the start how they will end. For fights where neither my defeat is guaranteed, nor my victory. For being challenged and succeeding despite being fired upon until the last minute, not where my opponent throws his hands in the air and just waits for the ordeal of being killed to be over. And for losing fights, and thinking about what I could have done better, instead of knowing that the fight was lost from the start.