No case....you are presumably an at-will employee......listener did not like you which is not illegal.
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You have no cause of action to sue for wrongful termination under the facts as cited here. All employment is considered "at will", unless you were made to leave your prior job or made to move in order to accept the job, none of which is the case in this instance. Sorry.
Behar Intl. Counsel 619.234.5962 Kindly be advised that the answer above is only general in nature cannot be construed as legal advice, given that not enough facts are known. It is your responsibility to retain a lawyer to analyze the facts specific to your particular situation in order to give you specific advice. Specific answers will require cognizance of all pertinent facts about your case. Any answers offered on Avvo are of a general nature only, and are not meant to create an attorney-client relationship.
With all due respect to the other attorneys who have answered, I do not believe we know enough to make a blanket statement that you have no case.
The question turns on what "problems" you discussed with your superior. If you were complaining about treatment you were receiving based on race, gender, religion, disability, or national origin (and possibly sexual orientation, as you say your are in KCMO), then this could be a case for retaliation and/or discrimination.
However, if the "problems" were garden variety workplace complaints, then the other attorneys are correct.
If the situation is more the former than the latter, call a local employment attorney--most will do free consultations. You can find a list of specialists at www.nela.org. Good luck.
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The only cause of action for "wrongful termination" in Missouri is for whistleblower wrongful termination. And whistleblower wrongful termination is only a cause of action if you told someone other than the supervisor engaging in the activity. Depending on what problems you were bringing to the supervisor you could have a claim. If it was just a complaint about how they run the business, they probably had a legal reason to terminate you.