The reasons libertarians have their own party is so they can be blamed for in effect voting for Trump when they did not vote for Trump. It is a form of self-flagellation to ensure no matter which sides when, it is your fault to the other side.

When confronted with the possibility of a second term of Trump's uniquely destructive anti-leadership and proven track record of being highly corrosive to individual liberty, if you couldn't swallow your pride and vote actually-conservative then that's on you. I myself had never voted for a major party candidate in a national election. That changed in 2020.