I would need more facts about what you feel is the true reason for your termination. You say "hostile work environment" but, it is unclear what you mean. Without more facts, its impossible to say whether or not you might have a case.
NOTE: The response given is not intended to create, nor does it create an ongoing duty to respond to questions. The response does not form an attorney-client relationship, nor is it intended to be anything other than the educated opinion of the author. It should not be relied upon as legal advice. The response given is based upon the limited facts provided by the person asking the question. To the extent additional or different facts exist, the response might possibly change. Attorney is licensed to practice law only in the State of California. Responses are based solely on California law unless stated otherwise.
Are you seeking unemployment benefits? If so, you need to appeal the EDD decision within 20 days of the mailing date of the determination letter mailed to you by EDD. There is a form enclosed with the denial letter for this purpose. The matter will then be assigned to an administrative law judge for a hearing. You can make your arguments and present evidence and witnesses during your hearing to establish that you were not fired for misconduct, and are in fact entitled to benefits.
If you reported the hostile work environment to the owner, and your employer did nothing to remedy the situation, and retaliated as a result of your reporting this, you would have a wrongful termination case. However, often what an employee defines as a hostile work environment is not in fact a hostile work environment as defined by law.
A hostile work environment is created by discriminatory actions on the part of the employer, and usually also applies to harassment by other employees. If sexual harassment or discrimination based on an employee's status in a protected class (gender, race, religion, national origin, etc.) is pervasive and severe to the extent that the employee in the protected class is unable to perform their job duties, then the work environment is considered hostile.
If the workplace was merely unbearable because individuals were rude or "hostile," and you report this to the owner, your termination is not considered retaliatory in a legally actionable sense. If you are an at will employee, your employer can fire you for any reason that is not discriminatory, even if it seems unjust.
DISCLAIMER: This response is for informational purposes only and does not form an attorney-client relationship. It represents only the educated opinion of the author. It should not be relied upon as legal advice. The response is based on the limited facts provided, and might change given additional or different facts.