Let me give you the real indications of people who are delusional.

1. They believe in god/s.

2. They deny climate change.

3. They think depression is a chemical imbalance instead of chronic unhappiness.

4.They think the virus is a hoax or that it isn't dangerous or they are cannot differentiate between freedom and one's responsibility as a citizen to obey the alw.

There are many more, but none of what you have mentioned are signs of delusion. They are just signs that you cannot negotiate argument with these type of people. Well, none of us can.