I worked at a very large telco for 4 years, and you just described a few of the people I worked with better than I ever could.

I once got a call from a Project Manager on conference with a bunch of VPs, letting me know I was now the sole support person for a new customer-facing product that went live that day.

On the call I confirmed with everyone listening there was no documentation for the entire system, no support procedures, nobody could tell me the name of the server or any credentials to even access anything, or what to do if anything went wrong. But there it was, dumped in my lap.

That PM always got a green tick for delivering projects on time, and got many promotions and bonuses.