Do you have an "Update Firmware" button at the top of the zwave details page by chance?
How long was the hub running when you took those screenshots of the zwave details?
The devices with the high number of route changes, those are your trouble starters.
Anything with power reporting, tune the settings so you get just enough info to do what you need, nothing extra.
Node 2E which is the one I think you said is disconnected and you cannot get rid of. I would not worry too much about it. It has no neighbors at this point, no devices should be trying to talk to it. It should not be hurting anything IMO.
FWIW, when I had my C7 up and running I could run a full repair and it would have 0 failed nodes by the end.
Oh also, for the screenshots, this ShareX tool has an option for a "Scrolling Capture" that can get an entire webpage in one image: Recommendation for Screenshot App - ShareX
EDIT: For comparison, by hub has been up for 2.5 days and the highest route changes number is 6. Also 90% of my devices have 10+ neighbors.
