Chelsea's performed very poor for this season how their statistic goals scored and conceded, until 27 matches Chelsea had scored 47 goals and conceded 45 goals with 2 difference goals become most poor performance with defensive and attacking line.
Agree that Chelsea's performance is not impressive this season even since last season, it seems that nothing good has happened to this big team because they only get random results in many matches.
Regarding the number of goals and goals conceded by Chelsea, it's not a good statistic, but have you ever checked what happened to Manchester United? because this team is actually worse in terms of goal statistics than Chelsea but Manchester United is better in terms of standings.
Manchester United were less productive than Chelsea but their defense was slightly better than Chelsea so that was enough to help them get into a better position.
Even if we talk about goal statistics, there are two more teams that are worse than Chelsea but managed to occupy a better position than Chelsea, West Ham and Wolves minus the goal difference, even though there is Newcastle which has a better goal difference but is ranked below these two teams, so sometimes good goal statistics don't make the team's position better, but I still agree that Chelsea is not good this season, but maybe next season there will be changes when the players they bought start to recover and can playfully in every match.