Not everything is perfect at all - there are very serious problems - but the country (and world) is transformed since before the Civil Rights Movement, and civil rights have spread to others (LGBTQ+ and disabled people, for example).

It's the people against civil rights who want you to quit, to believe you are powerless, that it is all for nothing. Maybe they want to believe it too! :)

That only started in the last two decades and in many places it's still a far cry away from being properly established.

Plenty happened in the four decades before that. Look up Stonewall, for example.

> it's still a far cry away from being properly established

That doesn't mean nothing happened. People can get married, and most of the country supports that!

Your complaint is that it's not a documentary?

Some people certainly would like to silence any discussion of it, and they have every argument in the book. Disdain / contempt are a popular tactic.