I understand that intuition and it is one I try to account for but cannot erase. Here's my thinking on why I turn this false.
1) Trump is hardly the first president to reduce income taxes. President Bush slashed taxes across every income bracket after winning in 2000 and most of those cuts were later made permanent during the Obama years. Bush also strengthened Medicare and passed the Patriot Act and even then Lichtman did not turn the policy key for Republicans in 2004. Compared to Bush, Trump has done far less. His tax cuts are popular as tax cuts almost always are, yet a majority of Americans, rightly or wrongly, report not seeing a difference. On healthcare, Trump failed twice to overturn the ACA before succeeding only in part.
2) Deporting immigrants living in the United States illegally is again popular politics but it is not a major achievement. Each administration makes a show of being tough on immigration and the same reality is ever-present: when the economy is expanding so does immigration; when the economy is contracting, so does immigration. Many leftists have pointed out that Obama deported more people than Trump, which is technically true but not an achievement on the national scale. In 2016 the national policy key turned against the Democrats as President Obama failed to produce any major policy between 2012 and 2016.
In summation, President Trump has advanced some goals you'd expect a Republican to advance, but he's not been wildly successful or particularly ambitious in his efforts. Arguably his signature policy goal is a large border wall (fence) that has not to be completed and likely never will be.