They have been investing in areas where I feel that they already have some good players.1 billion is a very big amount and out of that they haven't been able to make the results as expected. It's not only Pochettino's job but also others in management as it is not only made by 1 man and some of these transfers happened before Pochettino arrived. They really need to be smart in transfer window and not making any abrupt decision without thinking.
I think they've spent too much money without a clear plan. Instead of focusing on building their gameplay and strategically filling key positions, they've gone for good players without a well-thought-out arrangement. They could learn a lot from Sir Alex Ferguson, a seasoned expert in the transfer market. Every contract he made was a wise investment, and he had a remarkable ability to manage the players he brought in.
Pochettino wasn't a good choice I think. But at the same time there weren't many options available. They need a manager who understands how to develop a real squad and how to improve every single player. How can it be that they are again tumbling like last season? Any other club would dream of the amount they spent on transfers. Can you mess it up for one season? Well it should not happen, but it can happen. But two seasons in a row?
Perhaps Pochettino is feeling pressure from the team's leadership to quickly rebuild Chelsea following Abramovich's departure. As a result, he's been buying players he believes could benefit the club without a clear understanding of how to effectively utilize them.