You’d be competing against multi-billionaires and huge corporations. It wouldn’t be enough, even though it’s a ridiculous amount of money for one person.
Changing the US would probably be impossible. Maybe changing your state would be possible. Changing your local community would be much more realistic.
Helping people get homes and food would likely help reduce crime.
Helping people get educations would help some people escape certain situations.
If you’re fixed on changing the US political situation and you think there’s a party that can change the situation, you can go with political donations. I believe whichever party spends the most money on their campaign is the one that wins more often than not.
On average the world is better than it’s ever been
Of course, certain groups of people have been trying to reverse these trends in the name of…money? Tradition?
The newer generations are no longer becoming smarter (I believe it was the Flynn effect). Education is being defunded at all levels.
The cost of living in many parts of the world has been outpacing wages… especially now, but for decades. Yet we have more wealth hoarded into fewer hands.
Anti-vax and anti-science movements have been reintroducing measles and have been making it hard to fight other diseases.
We are seeing the effects of these things in action, and they will only get worse over time.