Yeah, people need to stop conflating MLs with Marxists, because Leninism and Marxism are not the same thing at all.
Leninists appropriated the "Marxist" label to lend credibility to their own ideology. Hence it's "Marxist-Leninism," not "Leninist-Marxism."
Nobody is out there calling actual Marxists "tankies." We're calling MLs tankies, and then they retreat behind a mote and bailey by saying "yOuR cAlLiNg AlL mArXiStS tAnKiEs?!1?1?!1?1??1?1!!"
Also, "tankie" is a term I exclusively hear used by the left to refer to their own fringe (who, by the way, refer to the rest of the left as "liberals" and "fascists" for not being as extreme as them...). It's like the left-wing version of maga. They're completely irrational, bad-faith, militant, and authoritarian.
I never hear centrists, liberals, or conservatives call anybody a "tankie." To them, the entire left are all just "commies," because that's the pejorative they use. They don't need the term "tankie," because the entire point of that term is to differentiate between the irrational, extremist fringe of the left, and the rest of us leftists who are capable of both rational thought and empathy (crazy idea, I know...), and are typically somewhere in the democratic range of the socialist spectrum.
disclaimer:
(Although I'll add that anarchists exist among us reasonable socialists too, but that's a very broad term and some self-declared "anarchists" truly are actually authoritarian tankies, which becomes clear when you listen to the things they say and how they handle disagreement.
Conversely, some "anarchists" are also actually neofeudal capitalist/corporatist fascists cosplaying as freedom fighters when all they really want is deregulation of industry...).