If you can directly identify any of these fallacies while arguing on the internet your stance on the subject instantly becomes correct and the opposing view wrong.
Elsewhere, this line of reasoning is called the "fallacy fallacy". But the linked site describes the fallacy fallacy as "an argument that is based on false claims, but is logically coherent", which sounds more like a false premise to me.
X: We shouldn't listen to health experts! They got it wrong at the beginning of the pandemic when they told us not to buy or wear masks, and therefore they are wrong now too!
Y: Wait, that doesn't make sense.
X: Strawman!
Y: Oh sorry sir/madam; you are correct. Please carry on.