I restructured your question to help make it comprehensible. I hope that doesn't cause offense. Apologies if it does.
I haven't looked too deeply into Biden's ghost gun order, but my understanding is that he is only making people put serial numbers on them.
If my understanding is correct, then the executive order itself is not so horrible.
The problem with Biden is that he wants Congress to pass draconian gun laws that violate our civil liberties.
He has no chance of getting these laws passed (or of preventing the courts from striking them down if they did get passed) so the threat here is not terribly dire.
But the mere fact that Biden would do terrible things to us if he could, makes people dislike him for his wish to harm us.
Trump, on the other hand, worked to protect our civil liberties. So people like him.