Legal Question in Employment Law in California

None, unless it is discriminatory on the basis of race, gender, or other protected classification, or because you have taken some protected action, such as being a whistle blower, filing a wage and hour complaint, or union organizing. There are, for good, bad or indifferent, no laws against being an unfair or otherwise lousy employer.

Not only are there no laws against 'unfair treatment' or poor management, but in general, unless an employee is civil service, in a union, or has a written employment contract, they are an 'at will' employee that can be disciplined or fired any time for any reason, with or without ‘cause’, explanation or notice, unless it is based upon illegal discrimination, harassment or retaliation under the ADA disability, Civil Rights [age, race, sex, ethnic, religion, pregnancy, etc], Whistle-blower, or similar statutes. The employee's goal should be to keep the employer happy and make the company money. That’s how they pay your wages. Now if the firing was illegal under those definitions, feel free to contact me for the legal help you’ll need.