How exactly do you think authoritarianism will lead to a collapse, and how will that collapse lead to democracy somehow winning out? Allowing fascists to take over just means we now live in a fascist society. When Germany turned fascist, they didn’t magically break up and become a shining example of democracy. It took serious external pressure for that to happen. Revolutions usually just change the power structure among those who were already in power-- they don’t suddenly grant power to the little guys. Even if, by some miracle, the US went full Nazi and didn’t just stay that way but somehow immediately collapsed, and hundreds of thousands died in a giant civil war and/or WWIII, and we don’t nuke each other off the face of the planet so hard it’s unrecoverable, you expect democracy will be the result? Why? How can you be sure?
TL;DR: Voting for a fascist won’t cause a collapse and a collapse won’t result in democracy, with any degree of certainty.
PLEASE actually think these things through instead of just throwing out ideas like this, because if people start to actually believe this we’re going to be in an INCREDIBLY dangerous situation (moreso than we already are!) and the entire world will suffer for it.