That's what a lot of Trump voters believe about people who don't like him. He used to generally have good public opinion (prior to his ascendance in 2015). A lot of people believe that his bad press is primarily due to intentional smear campaigns and lawfare by the powers that be.
In that sense, for many people, a vote for Trump is like apes in /r/stonks buying and holding GME. It's less about what they want in a positive sense, and more about what they don't want: namely extreme leftism and the current ruling class in Washington, the media, billionaires, and everyone else who attended the WEF in Davos -- all the folks who care nothing for the average Joe.
He may not fix it, they may not even expect him to be able to, but voting for him is a way to have a voice. At least he really upsets all those powerful people! And he did get some stuff conservatives liked done in his first term.