You're getting down voted for sounding partisan I suspect, but regardless of the politics, you're absolutely right. That bill was a huge change across the US tax system.
You’re over simplifying and singling out your pet political issue in an effort to sway opinion to your political leaning. If you had just said it was due to those tax cuts you likely wouldn’t have been downvoted.
https://www.taxpolicycenter.org/publications/distributional-...
[0] https://taxfoundation.org/data/all/federal/summary-latest-fe...