Well no, not really because of the relegation. The fact that they let him start the season and recruit players shown that they were willing to give him a chance however the extremity of the defeat forced the club into an extreme decision
This was the quote
"However, the board met this week following Saturday's unacceptable record home defeat in our opening game of the season."
So his sacking was a direct result of the defeat
And to answer your question if we were to lose 7-1 as Norwich did I think I would support the sacking of the manager