So it's safe to say the 30% that left bitcoin did it's damage by clogging up the network
What damage was there? Bitcoin worked and is working as it is supposed to.
It seems to me that the only damage done was to the reputation of those who moved their hash rate to an alt coin. But that too is fine as they are free to do that.
The damage is $20 transactions fees and no relief in sight.
If this is normal, you are out of your mind.