If they do not tell you what the future is, there is none.
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Weak leadership with no vision, no strategy or no ability to execute.
It is just a matter of time that the ship goes under.
Karriere/Weiterbildung
You have nothing more to learn.
Every job needs to lead to the next. If there is no opportunity to get new skills and obtain new knowledge, then the job is a dead end. "If you are the smartest person in the room, you are in the wrong room".
Vorgesetztenverhalten
Your immediate manager does not give you enough feedback and guidance, or has little interest in what you are doing.
S/he is not asking enough questions, does not spend much time with you or, worse, avoiding you.
Kommunikation
They do not give you credit for your work.
This is a terrible sign; all possible explanations are bad for you.