Because their teams are good enough to lift the title, yet they lost vs the underdog teams which was shocking for them, their fans and citizens! Additional reason for CR7 is the fact that this is his last chance to play World Cup and lift the Cup. It ended as a catastrophic end for him and his team. Less than 24 hours for the match between Argentina and Croatia. I wonder if Croatia will add another surprise in this World Cup.
Croatia may well present a surprise, because Argentina does not look so invincible and its success is based on the efforts of only two players, Messi and goalkeeper Martinez. But Messi's contribution to the team's success at this World Cup is still much greater. It's hard to imagine what the Argentine national team will be able to do if this day is not Messi's day. Therefore, Croatia has a fairly real chance to reach the final of the tournament again.
I totally agree with you. The performance of the Argentina team is completely dependent on the performance of Messi and goalkeeper Martinez. At least that's what we see in every World Cup match. And so, if these two players do not perform well, it will be difficult for Argentina to win.
On the other hand, Croatia's main strength is their midfield. Croatia's midfield is one of the strongest in this World Cup. And they are able to counterattack very quickly. This is why Argentina's defenders have to perform very carefully. Conceding a goal against Croatia will make it difficult to equalize the match.