Not bad. Hard to tell from the pics just how much glue is left. Here's what we do: Get a grill scrubber like this:
https://www.scotch-brite.com/3M/en_US/scotch-brite/tools/~/Scotch-Brite-Heavy-Duty-Grill-Scrubber/?N=4337+3294529207+3294631677&rt=rud
Spray one wall at a time with your fabric softner water mix and lightly scrub the wall, you don't want to remove the paint, then wipe it down with a terry cloth towel, get it good and clean.
I'm quoting this part from Demarpaint's post to make sure you understand is critical.
If not (happen to me), the glue will make some fine cracks under the paint (it absorbs water, then shrinks).....
Yes! Or the knock down will pop off the paint on the wall under it, if/when the residual glue decides to let go. It helps with the spackling/repair of the damaged drywall paper.
It also makes an excellent primer to hang wall covering on if you or anyone else runs into this and wants to hang paper on the walls again.