Sorry to hear that :( takes me personally 20 minutes or so. I normally run through with wiggs ep lando and boba then sub in sthan and sun fac for last two nodes if I need to. If I'm bored I use my poor droid swuad for first 6 nodes to mix it up.
It should get better as you develop. There seems to be points where you hit walls with GW but as you progressively gear your squad and other toons it'll become
Easier I'm sure