Presidents typically work with their party to pass something. His own party more often complains about a lack of help or counterproductive behavior that makes it difficult for them to pass things.
Trump's lack of effort to work with his own party was a constant topic, until his partly largely quit talking about it as no help became the status quo.
If you compare its process to the 2012 tax cut, there are big differences. The 2012 bill passed ultimately when Biden and McConnell agreed. The 2017 bill was drafted in secret and presented without the minority party seeing the bill at all. [0]
Senate Rs, IIRC. The boilerplate started with Paul Ryan; House Rs demanded it be revenue neutral. The wonks who drafted Tax Cuts and Jobs noticed a major revenue-melting rewrite down to one page by Mnuchin. Senate Rs had to suppress their deficit hawks, namely Corker, and House Rs “folded like a cheap suit” -- Jim Cramer. The sentiment from waving a single page bill around was that, really, any act would do, and only the corporate tax cut mattered. This is what led to the bill including hand-written changes in the margin.
First major tax reform in decades?