So the tool that's supposed to save your expensive carbon parts from cracking is actually the thing that cracked your expensive carbon part. That's a special kind of irony right there. 30% low means you thought you were torquing to 5 Nm but were really cranking it to like 6.5, which explains the snapped bolt. Spring based wrenches drift just from sitting, so two years in a drawer getting tossed around is basically a death sentence for accuracy. This is why I check mine against a beam wrench every few months instead of trusting the click.

That line about "11 of them as pwned" made my stomach drop a little, because that was almost me. I did the exact same dog name plus birth year thing for years and just kept telling myself nobody would bother guessing it. Then my email got hit and I spent a whole weekend resetting stuff while my hands were shaking. You did the right thing moving to a manager, and honestly getting 14 accounts cleaned up in 3 hours is pretty fast. For the old router, I just log into the admin page from a wired connection and change the password there, since most routers let you do that even if the sticker is outdated. Just write the new one on a piece of tape under the router so you don't drive yourself crazy later.