Previously, Pochettino could not maximize the players who had been brought in in this transfer window to be able to perform optimally in the two matches they had played. And Pochettino also has some good players in terms of their experience but they were not included in the last two matches. Call it like Lukaku, He is still an official Chelsea player and at least he had good quality last season with Inter Milan but Pochettino did not include Lukaku name for this season.
I also agree with your opinion. That Chelsea has spent quite a lot of money and they should be able to maximize the quality of the players they have brought in, not to ask for a budget and buy new players again. Well if they do again this must be a big joke.
The issue with Chelsea is that (1) most players are new and do need time to blend in together, if you check Chelsea the number of players they sold during the last transfer window it was almost completely overhauled.
(2) The manager himself is still new and his trying to study and understand the players too.