It’s possible to maximize and enjoy your outcome in a system while still opposing the atrocities that system did to your ancestors. I’m a Cherokee living in Oklahoma within the Cherokee Nation and we have to constantly fight to keep what rights we still have as a federally recognized sovereign nation. It’s not about “complaining and being miserable” it’s about holding onto our culture and doing the best we can to take care of our people. What the US government did to our ancestors still has ramifications and affects today. Native people are the poorest ethnic group in the US and a lot of it can be attributed to the treatment of our ancestors and the abuse that still occurs from state governments even today.
You should really do some more research. The federal government made false promises and deceived/abused the tribes involved in the forced removal. It was in no way an agreement made because “no one owned the land”