I’m not expecting Stearns to get fired any time soon, but their slow start is significant. They are more likely to miss the playoffs than make at this point, which is pretty embarrassing for their payroll 2 years in a row.
I read this article which has some more info on why their playoff chances are poor and the lack of production from offseason acquisitions.
https://blogs.fangraphs.com/no-offense-the-new-look-mets-are-in-quite-a-skid/