Criticism, praise is a very common thing in football, all players must have felt it whether it comes from management, supporters or from other parties.
Decreasing and increasing the performance of a player is also a very natural thing, we don't always see the best game from players in every match, not just Haaland.
The role of the striker in my opinion has been misunderstood over the years, yes many people think the striker must always score goals. In fact, there are other roles that must be played, for example opening up space for teammates or other things. It doesn't have to be scoring goals, the role of helping colleagues to score goals is also a role that a striker must play.
Referring to what you said, regarding other duties as a striker, I will direct it to one of the strikers that Arsenal have. Gabriel Jesus is one of the strikers that Arsenal have, but he is not as sharp as other strikers, for example like Haaland which we are discussing. G.Jesus, is one of the important players for Arteta's squad even though he doesn't always score goals in every game. but in fact, Arteta has always played him as a main starter. because, G.Jesus has other advantages, he is able to play adaptively, find gaps in empty space, make quick transitions, and he always rotates with his teammates. not infrequently, G.Jesus opens up space for his teammates to create opportunities. that is why, Arteta has more trust and always makes him a major player.
That's what I mean, I wouldn't rule out a striker who can score goals and that's very good indeed. You make a good point about Jesus, yes we know that he is one of the players who contributes a lot to Arsenal, although as you say he doesn't always score goals like Haaland for example. But his role in the front line is very important, to help the attacking process so that it ends in a goal. Last season alone when he was unavailable due to injury, we saw the difference between having Jesus and not having Jesus in Arsenal's game.
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I see many people who say Erling Haaland disappear in the field like you say, because they think Haaland is not suitable for the games against stronger teams and that's why people think Haaland is just a player who can have good performances against the teams with a weak defending system, while he is not because other teams usually focus on Haaland to make this player stop.
I honestly dont grasp the criticism around Haaland. He's consistently proven himself in major competitions, especially the UCL. I recall the previous season where he notched up goals against top-tier teams. Are we neglecting those? The issue, in my viewpoint, isnt with Haaland. Its more about the supply chain. How can he convert if he's not getting the right balls and passes? I noticed a similar pattern in the match against Newcastle. The guy needs proper ball supply to work his magic. We're merely into the early phases of the English Premier League, and Im quite confident Haaland will showcase his talent soon enough. Let's not dismiss him quickly based on a few isolated performances.
Whoever the player is, if they encounter a strong defense then they will struggle, not just Haaland. Looking at last season, when the club faced Mamchester City, their defense received special instructions to guard Haaland, and it worked a lot. But Guardiola's clever use of other players to be the second target after Haaland and proven when he struggles to find space because of tight guarding other players who create goals. Now here we can see good teamwork.