Well, two things:
One, that is a very alarmist view of Trump. He liked slinging around executive orders, but he had neither the ambition nor the audacity to be a Hitler. It simply isn't realistic to think he'll execute his second term by toppling the Republic, he doesn't have visions like that, even if many people have visions like that for him (including Mike Lindel, somewhat hilariously, with his apparent attempt to get Trump to do a false flag and establish emergency powers).
Second, look at history. Inevitably, some people who release leopards do get their faces eaten, but becoming an executor of a fascist regime isn't a loss of power, it's a change in title at worst and, if anything, something of an increase in power. Imagining Trump becomes a fascist autocrat, that doesn't actually mean that his whim is enough to unilaterally move things however he likes, and that is true of every leader in history. The reason for this is that his power, his authority, doesn't come from himself, it comes from the class (or classes, historically) that support him, so he needs to make sure to keep them on his side or they will absolutely just kill and replace him. The petty Congressmen that support him know this, and are fine with working in a paradigm where they benefit from his support and are left with a broad range of things that he views as acceptable (since Trump won't try to micromanage the whole country) in which to exert their personal agendas as they see fit.
But again, Fuhrer Trump is a fantasy. Maybe Tom Cotton poses such a threat, but Trump does not.
Does this all make sense?