Your definition of “left” is incorrect. Authoritarianism is never part of left-wing ideology. Once authoritatianism is introduced into whatever leftist construct is being discussed, the construct becomes right-wing. Full stop. When someone describes a “leftist” ideology that includes authoritarianism, you should consider that a red flag that a conservative is attempting to manipulate terminology.
Authoritarianism is definitional in determining political orientation. It’s not a requirement, but when it exists as part of an ideology, that ideology becomes right-wing by definition.
When you share memes or opinions that classify any authoritatian ideas as part of a leftist ideology, you are either gaslighting or have yourself been a victim of gaslighting (and are now sharing misinformation). This is harmful to the left. If you are actually a leftist, as you claim, please stop.
Here is a Wikipedia entry further describing the characteristics of left-wing politics to help clarify how authoritarianism is definitionally counter to left-wing orientation.