Summary:
Trump is a terrible person who has no understanding whatsoever about public policy, government, history, law, the Constitution, foreign relations, or much of anything.
He won the 2016 Republican nomination in a fluke with a minority of Republican votes, probably because Kasich wouldn't bow out soon enough.
Unexpectedly even to him, he won the 2016 election with the thinnest of margins.
He agreed to House Republicans' (Kevin Brady's) already designed tax reform bill, based on long established conservative tax policy.
That bill strengthened the economy, particularly the corporate tax cut. The strong economy compensated for Trump's many other policy wrongs.
Covid wrecked the economy and showed Trump in an even worse light. In 2020 voters rejected Trump.
Biden worsened rather than improved the Covid economy through spending-driven inflation.
In 2024 voters returned to Trump because they wanted a return to the pre-Covid economy.
But Trump hasn't delivered on the economy because his policies are harmful to the economy. The people who designed the 2017 tax reform are gone, driven out of office or retiring in disgust.
What went right during Trump's first term was the doing of others, who understood policy and deterred him from his worst inclinations. No one like that was permitted influence in the second term.
Second term Trump is the real Trump, and the second term results are the real Trump results.