Remember, it was the Republican Party who told voters:
Give us the House, and we can stop Obama's agenda.
We gave them the House in 2010.
Then they said, the Senate is blocking us. Give us the Senate, and we can stop Obama's agenda.
We gave them the Senate in 2014.
Then they said, we can't stop Obama's Executive Orders and refusal to follow the law as long as he and his administration are in power.
We gave them the Presidency in 2016.
As a bonus, the President was able to have his Supreme Court Nominee confirmed in 2017.
I don't care what you think of Trump. We've given almost total power (within the limits of the Constitution) to the Republicans.
If there is anything not getting done like repealing ACA, appointing independent counsel to investigate the past administration's illegal actions, or appropriating funding for the Southern Wall, it's NOT the President who's been in office all of 3 months. It's the Republicans in Congress who have had the path cleared for them to get a more Conservative agenda passed.
It's easier to blame one man than 535 members of Congress, but the reality is that's where the real battles must be won.
Our President is NOT an omnipotent dictator who decides every detail of every issue that gets passed. Congress represents US. The President is the one who makes sure what Congress says is law gets done.