If you genuinely accept critiques of Iran, China, and Russia as well as disliking the West’s capitalism then you’re just a communist, not a tankie. However if you just kinda accept critiques in a “No one’s perfect” kinda way but still cheer when Russians shoot Ukrainians, you’d be a tankie who fell for Russian propaganda. I’d recommend looking into the firehose of falsehood, it informs a lot about certain righties’ and lefties’ perspectives.