The appointnent and the whole managerial search is on Levy imo. He had ample opportunity early summer to appoint Potter or ten Hag or someone else in keeping with his DNA statement and failed. We appointed Nuno when we were seemingly out of options and only a week before pre season started. That last minute desperation leads you to make panic decisions which we've seen in many a transfer window over the years.
Fans wouldn't have had Potter, the atmosphere would have be even worse than it is now, Ten Haag didn't have an back room staff and didn't plan to bring them across with him and he apparently was aloof and shy in the interview, the fact that we've gone back to Nuno over anyone else tells you more about the other candidates.
Nuno is fine for a rebuild which is exactly what we're going through, Spurs fans won't accept it because he plays cautious football but IMO we could have done a lot worse.