Yes, buying players will not be a guarantee that the team will get good results because after all, in the last transfer window Chelsea also managed to buy players but in reality they needed adaptation to get good results. So, about Chelsea's success in buying players at this moment, it is just a quick transfer because basically Chelsea also has good finances. Therefore, it looks like it will be easy for Chelsea to get the players they want, moreover the price is still suitable and not too expensive like the previous rumors about signing Osimhen. But yes, in essence there is still no guarantee Chelsea will get good results next season just by getting players faster than other teams.
Chelsea wants to be like Real Madrid in the past, when a club brings in great players then their performance will increase significantly but unfortunately that didn't happen for Chelsea. Everything takes time between coaches and players especially in the Premier League competition and pressure can disrupt their concentration, Chelsea have failed for 2 seasons in building a squad and they want to repeat it next season, do you think Chelsea will succeed or make progress? in the first season with a new coach I wasn't too sure but in season 2 it might be possible.
If a new coach wants to build a strong team, he must be given time. Stabilizing a team is not an easy task. It needs a long time. But Chelsea management wants to reap the rewards quickly. This is never possible. If a team grows strong too quickly, it is likely to fall too quickly.
Chelsea's overall performance under Pochettino at the start of the previous season was poor. But at the end of the season we saw a great performance from Chelsea. If Pochettino had been Chelsea's coach at the beginning of this season, the Chelsea team had the potential to improve. But Chelsea management changed the coach again. It is too early to predict whether the new coach will succeed with Chelsea.