way out leveled in galactic warfare

They aren't in any hurry to fix it because it isn't really broken (other than the broken nodes, but that isn't really the issue here). It is meant to be challenging. You are supposed to be facing a team with X% power as yours, with X going above 100% in some nodes. It's meant to reward deep rosters. I recommend not developing a deep roster at your level though. If you don't finish GW that's ok. Arena is more important. Focus on that first. You can worry about GW/raids/etc secondary. Focusing on arena will make GW harder, but it's worth it to have a good arena team. You just have to accept that a consequence of that decision is a hard GW.