Almost regardless of political positions it's hard to argue Trump is fit or qualified to be president. He is openly corrupt, persuing an economic policy the vast majority of Conservative economists think is idiotic, and has called our veterans losers. Has never held any other government post has no knowledge of government policies and worse doesn't care to learn. Even though his ignorance is causing a lot of damage including to his voters he doesn't seem to care to learn about how any policy stuff works.
To counter that you need media like Fox or worse OAN/News Max to put out propaganda because it's impossible for even the most partisan person to defend him if they're an honest and thoughtful person