Of course those things aren't taken into account by the Ralph-out brigade. They never are.
And I bet if I could be bothered to go through the records, I could find equally "unacceptable" results as the Newcastle and WBA games under Koeman.
We had "unacceptable" results (usually in the cups) under Pochettino too, and by anyone's reckoning, he's a top, top quality manager.
With Puel, Pellegrino and Hughes, there were players who were itching to get them out. I'd be very surprised were that the case with Ralph, as the players (and, thankfully, the board) are aware that he's a class manager.
As you say, absolutely not perfect, and there are justifiable criticisms, but he's very good (as has been shown, for the nth time, at every club he's been).
You can find games under Ron as "unacceptable" as losing to a 9 man team and losing 9-0 twice?
Where?