I certainly would have an issue with someone seeing me as sub-human and expressing that sentiment particularly if I could not avoid that person.
Have you encountered anyone who has behaved toward you as if you were sub-human on chain or otherwise in the Hive community? I would imagine that sort of thing to be less frequent here than in real life. We are all a pretty select group of people.
As for the value of our rewards relative to our living expenses, I would say that's a different thing than how easy it is to live where we live. And I don't think it is unreasonable to say that covering one's living expenses is easier with Hive income in poor countries with lower costs than in countries where everything is more expensive. That's just mathematics.
As for how much we deserve as rewards for our content depending on how expensive our home countries are, I can't confirm or deny that as I haven't looked at the issue systematically. But it seems to me that the correlation between the country one lives in and one's rewards is pretty weak.
Social status on Hive is largely a function of one's Hive Power and age on chain. No one with over 100,000 HP would be considered a bottom feeder on Hive regardless of where they came from.
As for your reputation as a Nigerian, that's an interesting question. When you travel abroad where no one knows you, people will judge you by your nationality. But here you are an established user. Your content and your history is all traceable many years into the past. Every on-chain quarrel you've had is searchable. All your financial decisions are accessible by anyone.