The looking glass only pings the login server, and is only useful if you cannot connect to the game.
Instead, you’d want to use a WinMTR. For links, you need to break them with a space, or post the results on Pastebin. Please don’t omit any lines of the test.
Note: Blizzard nodes filter pings, so they will often return results in the thousands. However, if that was the real ping to those nodes, you wouldn’t be able to connect, and it would show up throughout the rest of the test.