In the case of Trump getting elected, you're assuming that we'd still have anything that resembles a democracy four years later and that the people who'd supposedly be ready to take action wouldn't be thrown in jail or disappeared or suppressed via collective violence.
Resigning oneself to naked fascism with the idea that it could somehow lead to more progress down the line is quite the gamble. Perhaps it could work out, but you're playing with some serious fire.
Trump isn't Mussolini. He's more Berlusconi, if you want to stay in Italy.
It's anyone's guess how Trump would actually rule, but throwing dissenters in jail would be admitting defeat on his only real core value, which is that he's so great that he always gets his way on charisma and "negotiation skill".
Other than that, I do agree that "it must get worse before it can get better" is bad policy, since the former is usually a lot more reliable than the latter.
Resigning oneself to naked fascism with the idea that it could somehow lead to more progress down the line is quite the gamble. Perhaps it could work out, but you're playing with some serious fire.