That happened last season in the Chelsea team and whether Chelsea can get much better results next season, it seems that it is still quite difficult to say now because next season Chelsea will also be coached by a new coach with a composition of young players who should be better. But I don't know if Chelsea will be better or even worse because in the Premier League if there is a team that is less consistent in winning matches, the team will be left behind more easily and cannot become champions.
Chelsea had a whole lot of inconsistent performance last season, although we could give considerations on the fact that it was a new coach they had so he was trying to still find his feet but then he got sacked by the end of the season because they taught he wasn't doing well enough, now I'm seeing that he actually did his baes even with the inconsistent performance, it would have been better if he was given some time maybe he would have gotten even better this season but then here's Chelsea with a new coach to start all over again i hope they get off better soone before the season goes far that they may not have a chance again.
Chelsea and Pochettino last season started the season inconsistently. Sometimes they play quite convincingly but then in the next match they play quite disappointingly. but actually in the second half of last season Pochettino was able to make Chelsea more consistent. And we can see the results from the ranking that Chelsea managed to get at the end of the season, namely 6th place. If Man United had not won the FA Cup Final then maybe now Chelsea would have gotten a ticket to the Europa League. Unfortunately Chelsea didn't get any tickets when they reached 6th place.
And unfortunately Pochettino left and Chelsea had to change coaches. Enzo, who is now Chelsea coach, might be able to bring about better changes if he understands and continues what Pochettino built last season. It's just that because so many new players have been brought in, Enzo will have extra work to do in selecting which players will be worthy of being in the main squad. And sometimes that will take time. So at the start of the season maybe Chelsea will be inconsistent again.