That’s not the right question to ask.

You are asking for validation for resenting your father. That won’t achieve much except making you feel more disgusted at him.

Learn from his mistakes, and be honest with your own. That will achieve more than anger and resentment.

Your father does not seem in great shape either. From what you described he lost fortune, friends and family. If you call him a looser he will just loose his temper, and you won’t have a father anymore. Your conversations should not involve name-calling, set boundaries there without escalating the conflict.