Would you consider the following to be signs of a mental health concern?

Talking to oneself and arguing is not necessarily a cause for concernl However, you are also describing typical paranoinoic (gonvernmental action regardless of motive), histerica (emotional outbursts), anti-social behavior (the difficult descrition of actions in a group) with sociopathic tendencies ("nihilistic perspective--purely sociatal concepts" and "feelings of dispair or guilt") it almost sounds like suicidal tendencies and appears as a cry for help and counseling. Under the above cirstances, (and I hope not a joke) yes, this is a mental health concern.