It's just as likely that the Republicans nominate one of Tim Scott, Marco Rubio, or Mitt Romney, and the US presidential election comes down to a qualified center-right Republican and Joe Biden.
I think the 3 people you listed would be highly unlikely choices.
As far as Haley or Desantis, I'll believe it when I see it.
Doesn't seem to matter which party you choose, both are pro war and pro big government corruption/cronyism.
At best I'll vote against the incumbent, at worst I'll vote third party.
The plight of being a 10%er is that you don't have voting power or money.
Also the Democrats' hands are tied, not being able to pass substantive non-financial legislation like HR1. Budget is one of the few things they can use this "reconciliation" to push through without filibuster, and so they're trying to use spending to solve everything.
I'm something between fiscal conservative, neoliberal, libertarian, and moderate. Labels are bad imo.
I don't like either, but I'd much rather have MMT government spending than for them to push interest rates negative to create even more private sector malinvestment. In that light, the current stimulus spending is actually a good thing for fiscal conservatism - it will make real CPI inflation that will reign in the Fed.
I don't think it was reasonable to expect Biden govern like a libertarian.
Biden has been pretty moderate. The Republican position on spending is so extreme it's pointless to meet it in the middle, and Biden has been restraining the progressive wing of his party (e.g. on the filibuster, etc). I also really doubt most Americans are that concerned about the government spending more money (and those that are are almost all squarely in the Republican camp).