Fleet, balance has been swinging around quite a lot on this stuff, in 4.041 you'd probably get a very different experience (though I hope you have a save from before planting that hub, as once it's planted the attack has been spawned and won't be changed by loading in a later version).
But 8 golems in the first hub wave? It's only 60,000 points and is supposed to be split at least 2 ways. If you were playing on difficulty 8 it's 90,000 points, and if you were playing with multiple homeworlds it multiplies by that number.
If you enable advanced logging (on the advanced tab of the settings window) it will write a EventAttackCompositionInfoLog.txt file to your RuntimeData directory when spawning one of these attacks so you can see how many points the armada got, how many battlegroups, and composition and point total per battlegroup.
Anyway, sorry it stomped you so hard, I've really been trying to get it down to a reasonable level