Biden has done basically nothing with Ukraine other than what any other sissy would have done.
The issue here is not just Russia-Ukraine. There are scores of other autocracies around the world who could easily invade and overwhelm neighboring states, but they hesitate to do so because they assume that the "world is watching." If Russia gets away with this grab, there will be nothing holding the others back.
I am not suggesting that the U.S. act unilaterally, but the U.S. must gather a coalition of countries that together will punish Putin and even drive him out, so that the whole world will see what happens to authoritarians who take this path. And it WILL be necessary to rattle our nuclear sword once or twice in the process. WE have the ability to obliterate Moscow. Our nukes will WORK, while nothing made by the Russians is reliable, and could easily blow up on the launch pad.
This "war" cannot end with Putin controlling half of Ukraine. Period.