It was a huge tax cut for rich people and corporations. Everyone else gets fucked.
Not only that, but instead of reinvesting in their companies to create jobs, said rich people and (especially) corporations used the money on stock buybacks to inflate stock prices (which used to be illegal until Reagan, since it's a form of market manipulation which has no bearing on how the company's actually doing), which in turn inflates CEO compensation, since that's often linked to stock prices.
As I've heard it put, this wasn't a tax reform bill, it was reparations to the rich for the crime of the New Deal.
As for the tax increase stories, probably part of it is an attempt to correct overwithholding, leading to people getting more on their paycheques but less on their refund (if anything).
But in a few years federal taxes will go up for most people, and the rich will continue to tell the middle class to blame the working class (especially undocumented immigrants) for their problems, and said rich will run out the door with all the money.
The bill is class warfare, plain and simple: class warfare waged by the rich on everyone else.