Dodgers got cheated.
The Cubs window was about half the size.
The point was that from 2012 to 2018, this team couldnt get out of the NLDS. All those teams you mentioned managed to do that. At no point were the Nationals even close to a WS during their window
He also ignored the Red Sox and Giants teams that won multiple championships last decade, even though roughly half of those teams (2012 Giants and 2013 Sawx) were held together with Krazy glue.
Multiple championships in a short time is tough, but let's not pretend it's impossible, especially if a team contends regularly.