The entire thing. A handful of groups are responsible for a huge percentage of total war decs. The number of ships killed in wars is low, but almost totally lopsided in favor of the attacker. Defenders almost never fight back, and the clear meta is to just log off for the week, and the stats show that players who do that don’t bother logging in again.
You fix it by creating victory conditions that provide a meaningful way for defenders to win, limiting how many wars groups can start at a time or over a period of time, tying the ability to dec a group to structures in space, and creating an incentive for defenders to win - say, they get the fees if they win the war.
Obviously we can’t get rid of war decs without coming up with a solution to high sec citadel spam. My comment about yanking them out and dealing with it in six months was hyperbole based on how nuts the metrics are.
But this needs to get fixed ASAP because it’s bleeding new players from the game and we need to stop that.