Chelsea players performing badly has nothing to do with Enzo Maresca speech, Enzo met Chelsea at a very bad state so his interest was to build the team before he can talk of contesting for the league title and that is a wise speech by Enzo because you don't expect him to just start feeling big since his team were performing well initially. He saw that Chelsea needs many works to be done so he was more focus on preparing the team ahead of next season because he knows it may not be possible for them this season because even when they were second in the league table they never thought they were title contenders. Chelsea being inconsistent do not mean that they can't finish within the top four positions, they still have some strength and potentials in them regardless. Besides they still have about 13 games until the end of the season so they can still perform wonders.
What is this?
A club spends over 1 billion euros and you're saying they can't compete for the league? Is that the standard? How much does the team need to spend before they can be title contenders? 10 billion? How does this make sense to you? Any team that spends that amount of money has no other goals but to win the league and every other available major trophy. You don't spend that kind of money and say you can't win the league or expect your team to simply make the top 4.
The statements he made are very wrong. Imagine Ancelotti saying the team he has can't win the league, he will be sacked the next day. Xavi said his team cannot compete and he was fired immediately, that's a serious team.
If a manager can say something like that to the press, what do you think he has said to the players? He has taken away every confidence they may have about winning the league. That is not the kind of statement Pep Guardiola can say and no Manchester City player can say that. They will tell you they will fight for the league until it is mathematically impossible to win.
Also, with this kind of mindset, I'm sorry but Chelsea is not making top 4.