He can't start horrifically, I agree. But, it does feel a little different to Nuno and Frank starts off in a far less fragile position than Nuno did...
From the off, Nuno was famously at the absolute bottom of our list.. The one guy who was not in a club and would say yes.. He felt like a transient appointment from the start. We're paying 10 million to get Frank and it seems he was the main choice that we went after. So there's an immediate investment in terms of the club needing him to work out. Far less likely to bin him off after it starts getting rough.
Nuno also came in post Jose, when there was desperation for us to attack at all costs in nearly every game (maybe City and Liverpool aside), and there was a necessity for him to go against type and try and play a style of football that is just not who he is.. Remember the Chelsea game at home where we started Dele, Ndombele and Lo Celso? I think now, while we want a coach who's default is to be proactive when we're the better team, there's a hunger for balance and more nuance now after the last two years.
Probably the main factor will be the players relationship with him.. There were leaks from early on that Nuno and the players had a distance between them. If Frank can get the players to buy in, than it'll be far easier for him to ride through early teething problems.