Having good chemistry is really what Portugal lack in this world cup. Right from the start they have been struggling with performance not because they don't have quality players enough but because they don't have good understanding and communication among themselves that's why they are struggling.
They lacked of good player chemistry in many recent years, not only in World Cup 2026. With many star players they had since generation of Rui Costa, Figo, Nuno Gomes, Deco, they actually could perform better but it seemed their players failed to combine together as a team fighting for a same target. In the match with Spain, this weakness shown again as they could pass the ball to Ronaldo in some situations which can result in very good attacks, even chances of scoring goals. By unknown reasons, their midfielders did not make any key passes to Cristiano Ronaldo and it's a disappointed match for them in attacks.
They have one of the best midfield combination in the Tournament. Vitinha and Neves are the best duo in the champions league while Bruno Fernandes won premier league best player last season but still they are still not able to show anything. Against Spain they need to communicate well if not they will struggle. Spain also has a good midfield so it will be an interesting battle in the middle of Portugal midfield trio improve.
They are world class midfielders but they could not combine together well enough for making a world class midfield for Portugal. Without that, Cristiano Ronaldo always played with not enough passes from his teammates. Look like Bruno Fernades did not want to play with Vitinha and Neves as well as did not want to stay under Cristiano in the team. He wants to be a captain, a boss in midfield, so let's see what will happen next with this national team after Ronaldo era.