An ad hominem would be to dismiss an argument by attacking the person or circumstances. You know, like calling someone a Russian bot.

Secondly, I think you missed the point of the image. You claim to believe America is bad, but simultaneosly adopt it’s views on geopolitical rivals uncritically. Yes, including the view that anything that portrays the west in a negative light being “Russian propaganda”. Funnily enough, that’s the real ad hominem and is something incredibly common to hear coming out of liberals.

That’s not true, anarchists regularly allow themselves to be infiltrated by cops and closet white supremacists.