[[ -clears throat-
Itachi realized what he did to Sasuke was fucked up, manipulative, and permanently damaging, and also did not ask for Sasuke to forgive him. If you think Itachi is always loved/excused 100% of the time for what he did to Sasuke, idk what kind of circles you’re operating in. He’s called out plenty for it, especially among anti-ending circles. We can be slightly lenient on Itachi because he realized what he did and refused to do it again, he knew his good intentions meant jack shit, and let Sasuke go free and make his own choices. Itachi was also thirteen when he did it.
Sakura has never realized that her actions, confessions, and guilt trips towards Sasuke were manipulative. She ends up completely getting away with it. People are harsher on Sakura because no one (within the series) calls her out on this behavior, and she works to pull Sasuke back into a relationship he never wanted to begin with. Sakura was sixteen when she did it (and has continued to do it even in her thirties.)
Stop trying to compare them, they’re not the same. Itachi became self aware and stopped. Sakura didn’t, and she never will.
And to the “Sakura was a teen/didn’t know better” argument…. Again. Itachi was thirteen when the massacre occurred and had been manipulated since he was four years old. Sakura was 12-13 during her very first confession. If she gets excused because she’s so young, so does Itachi. Sakura’s behavior hasn’t changed in 20 years. ]]