It doesn't matter how active Chelsea are in the transfer market and how much money is spent because it is the result and the performance on the pitch that will be judged. Because if a budget of that size does not show significant results, Chelsea will automatically receive a lot of criticism, including a failed coach.
Been too active at times in the transfer market isn't always good because when you over buy players, instead of you making a squad strong, you weaken it because when there are too many different players in a squad that haven't played together for sometime irrespective of how professional they're, they'll find it difficult to work together because they have different orientation of how to play by the difference coaches that coached them in the past. It'll take sometime for the new coach philosophy to get into the players and by then it might be late to catch up the other teams gathering up points from each game week. Chelsea has spent so much in the transfer window but it's good that the players are playing as a team. They just need finishing because that's where they're slacking.
Pochettino was challenged to build Chelsea from scratch after several coaches failed. So the question for Pochettino is whether he is able to complete the task or is he not able to do it but is still forced to do it.
I don't like Pochettino's coaching style. He likes buying already-established players. I will not be wrong if I assume that he depends on big names to win trophies. I am more comfortable with coaches that build young players. Coaches that groom unknown players to superstars are the best in the world.
Is there any coach currently coaching a big team especially in the premier league that doesn't buy players in this modern day of football, Pep Guardiola buys players, Klopp buys players, Jose Mourinho bought players when he was coaching in the premier league as well. Everyone buys because if you can't give your employer an instant results, your chances of continuing at the club reduces and at Chelsea, we have a reputation of firing managers very quickly so he can take his chances here. When you think about it, it isn't Pochettino signing players but the owners of the club are the ones interested in signing players. Look at Pochettino time at Tottenham Hotspur, how many players did he sign then look at how many, other managers signed.