Well we can reframe that slightly and it still works.

“You gaslit yourself into thinking a genocide was justifiable to win, and you lost. Now you are just a loser who supports genocide.”

This is great. It’s so flexible

“You threw economic populism and the poor people of this country under the bus in favor of chrony capitalism to win, and you lost. Now you are just a loser chroney capitalist.”

“You became a xenophobe to win and you lost. Now you are just a xenophobe.”

“You sacrificed a movement politics for donor money to win. Now you are just a loser with no base”