Socialists have tried seizing power through parliamentarianism and it hasn't worked a single time
They've also tried seizing power through direct action and that also ends in abandonment of principles (when it doesn't end in full on collapse or terminal impoverishment). Sounds like the only thing the authoritarian left can do is make other people miserable before they choke on the dust of overwhelming failure and then die. I'm glad I will see my ideas continue to work instead of tearfully insisting they haven't been tried yet for decades of increasing irrelevance.