Last season, Arsenal were the only London club to fail to win a trophy, while Crystal Palace won the FA Cup, Tottenham Hotspur won the UEFA Europa League, and Chelsea won the UEFA Europa Conference League and FIFA Club World Cup. Arsenal were left with little to show for it. This was a tough test for Arsenal to recover and win a trophy, and perhaps this is what prompted them to make significant improvements in the transfer market this season.
Arsenal have not had that quality all this time, which is why they have been failing to win trophies this season. You can see they were lacking something, and it really affected their stability in performance for a long time.
However, it is great that this season they have done what is necessary to strengthen the team, and now Arsenal can easily achieve some targets. If Arsenal had understood the importance of signing these players long ago, during all those seasons when they were close to the top, they would have won one or two trophies by now.