Are Wardecs always going to be broken? Is a fix even possible?

Yes. EVE has been open-world, 24/7, PvP anywhere for going on 22 years now. If there were areas where there was no PvP allowed, then no ships or modules would be lost there (unless you just suck and got killed by NPCs), thus fewer ships and modules would be sold because they weren’t being lost.

You would see hordes of bot mining farms, and auto-pilot market haulers, because there would be zero risk.