These pre-game seasons are quite worthless when it comes to their meaningfulness for the real season. Of course you could say that Nunez scored a few goals, but against whom? Yesterday they played against Greuther Furth, a 2. Bundesliga team from Germany and they played 4-4. Now is that a good result for Liverpool and does it mean that Nunez is the right guy because he scored 2 goals in an 8 goals game against a 2. Bundesliga team? This is really meaningless in my opinion. The first real test will be against Chelsea when the new season starts.
I'm not praising Nunez I'm just comparing it to when he first joined he did the same as yesterday's match scored a lot of goals in pre-season matches but when he goes through a real season he couldn't do much the result is not as expected that's why I said don't be too quick to praise Nunez because he could have repeated the same thing as last season, very good on pre season and bad in real season. I know we can't jump to conclusions in pre-season games because it's just a strategic experiment, just look at most of the mainstay players entered in the second half whereas in the first half Klopp played second tier.
I definitely agree with you and this happened quite often that a player performs so well in the pre-season or in another club because everything around him fits his inner expectation of a comfort zone that makes that specific player perform, but then they get to play under pressure or change their environment (club) and it is like it's game over for them. 25 goals in a season in club A, then 5 goals in a season in club B. Every time we think that this shouldn't be the case because a player has proven his quality already, but to be honest most human beings are no different in that they function better in certain places. There are a few exceptions like players like Messi, but most aren't like that. Nunez is a kind of guy who needs the perfect environment around him, for him specifically. We'll see whether he finds what he needs in Liverpool.