Enzo Maresca can still turn things around for Chelsea just that it's gonna take him time since he is just coming from the championship to the premier league so the experience is not gonna be the same but with time he will adapt and possibly make a difference.
Enzo Maresca is the new hope and he will face a tough task that awaits him ahead, if he fails his fate will be the same as Pochettino, maybe even shorter. Pochettino legacy young squad seems to have developed for the better, they appeared more solid towards the end of the season. However, it is possible that Enzo Maresca will make some changes to support his strategy, to be fair we also have to give him a chance, who knows, Enzo Maresca could be luckier than Pochettino in the future.
I get what you are emphasizing on because when we look at it in your direction Pochettino really tried towards the end of last season because from how Chelsea started the season and to end in the 6th position mean that Pochettino was able to discover some of the club's weakness and made some amends for the team hence their ability to end the season well even though the F.A cup trophy that Manchester united won denied Chelsea of having a spot in the Europa league next season.
Checking at Enzo Maresca career as a manager so far I can see that apart from Leicester city that he succeeded in bringing back to the premier league he hasn't really coached a strong team though for once being an assistant manager to Pep Guardiola at Manchester City in 2022 and 2023 means he has learnt a lot from a successful coach and that was the more reason he was able to bring back Leicester city to being promoted to the premier league so let's be hopeful that he can make good improvements for the West London club Chelsea FC next season.