Pakistan cricket team did not do well in the preparatory T20 series before the World Cup. Only two matches were played and in both matches against England, England beat Pakistan by a big margin. Before the Pakistan T20 World Cup we saw that they underwent army training but did not see any effect on their performance. In the fourth and final T20 match against England, Pakistan's poor performance in both formats, batting and bowling, was largely the reason why they lost against England by a big margin. Having won two T20 matches against Pakistan by big margins, England team will definitely be positive enough in the World Cup and they will definitely do well in this World Cup.
Since the 2021 T20 World Cup, the middle order remains the major concern for the Pakistan team. Their openers were scoring runs and also taking the blame for the loss. Pakistan's middle order hasn't performed well in the last match against England. In the World Cup, opponents will be looking to take Babar, Rizwan, and Fakhar's wickets because they are the only players who can steer Pakistan to victory. In the bowling department, I think they should have included Waseem Jr. instead of Amir. The guy performed well whenever he got the chance in the last World Cup. Amir is a lost cause and a failed experiment. They also need a front-line spinner, as they lacked a quality spinner in the ODI World Cup played in India and paid the price.
As far as England is concerned, their team looked balanced. Englans's bowling attack looked threatening after the arrival of Jofra Archer.
I agree that Australian team poor performance was the main reason for their loss to West Indies. ... I hope West Indies will continue this performance in World Cup too.
West Indies outplayed Australia in every department. A target of over 250 is not an easy task anywhere in the World. WI batter destroyed the Aussies' bowling lineup from ball one. In the end, Australia did well in the batting department. Keep one thing in mind, Australians did not have their front-line bowling attack.
West Indies has the most explosive batting lineup, and all of them are in good touch. If their bowlers perform well in the World Cup, they might end up in the semi-finals.