I'm on the left, but I can't stand internet leftists

"WhY DiDn't bARacK ObAmA FiX tHe Us HeAlThcAre SyStEM?"

Motherfuckers. Go read some actual books.

He had to fight a harsh, brutal and bitter political battle to get the freaking US Congress to pass some small improvement. He had to literally beg Senators.

It's really not as easy as you make it sound.

"WhY dIdN't He ReGulAte WalL StReET?"

He did. It's called the Dodd-Frank Act.

https://en.wikipedia.org/wiki/Dodd%E2%80%93Frank_Wall_Street_Reform_and_Consumer_Protection_Act

"WhY dIdN'T He WanT tO TaX tHe RiCh?"

Actually he did. All the budgets he proposed wanted to increase taxes on the rich. After he lost the midterms, he never had a majority. The US Congress rejected most of his budgets.

Internally, the US President has a lot less power than you think