My wife manages her father's taxes because of his dementia, she's never once gotten help from the IRS for questions THEY asked. We've sat on hold for 2+ hours before, no answer. We end up paying accountants instead which comes out of pocket and costs more than the tax refund.
Both Reagan and Obama had a simple fix for all of this (easier taxes, less audits, less IRS agents). It would have made both Republicans and Democrats happy. Sadly, corporations block it every time it gets brought up in Congress.
https://www.youtube.com/watch?v=vGVK4ibMI-Y