Itās so unfortunate because the way Occlumency lessons set up the Snape and Harry connection and explore them as reflections is truly genius and so compellingly written, it was literally the perfect opportunity to give Snape a true redemption arc and start changing his behavior towards Harry.
I will give credit where itās due: Snape doesnāt mock Harry about any of the traumatic memories he sees. He even almost compliments Harry a few times. He seems to be occasionally trying. Even when he isnāt being the most sadistic version of himself which he is 99% of the time, he clearly just has no clue how to teach (although, after 15 years of having children in his care - certainly including children whose families were victimized and killed by Death Eaters and Snape himself - the least he could do is suck it up and learn how to teach). Faced with proof that Harry isnāt a pampered prince like James, Snape is clearly very reluctantly seeing himself (and seeing Lily) in Harry.
Unfortunately, all of that is made null and void with Snapeās reaction to Harry viewing SWM and all his abusive behavior in the future.
I canāt believe itās still debated whether Snapeās reaction to Harry viewing SWM is about the Marauders or about Lily. Itās not his worst memory because of James, itās his worst memory because of Lily. If Snape didnāt react like that to Harry seeing memories of his abusive father, then his reaction here isnāt due to a memory of being bullied.
And Snape like, very very openly says things like āSirius tried to MURDER me!ā in front of Harry, he was never even pretending that he was anything but a victim of the Marauders, he claims that status readily! He seems like heās blatantly implying it in a lot of the things he says about James, he also shows Harry detention slips of the Maraudersā attacking others (idk if they included any slips of them attacking him but heās still obliquely alluding to their ābullyingā and therefore the Pensieve memory), and willingly brings it up in HBP during his duel with Harry after Dumbledoreās death.
People say SNAPE had his privacy invaded? Snape only had one singular memory revealed, to one singular child (okay, two, counting the one with his dad). This book consists of Siriusās childhood trauma being put on display for the whole Order, including Snape, to see for a year - which Snape constantly mocks him for, despite his conveying the prophecy being what led to Siriusās best friends being killed and his imprisonment and torture in Azkaban, which Sirius is still paying the consequences for and is the whole reason heās stuck in that house as a fugitive. And still, Sirius endures it, because having Grimmauld Place as a safe house helps the Order. Snape has seen months and months worth of Harryās worst memories, memories far worse than SWM. Snape also had no issue reading aloud to a whole classroom an article that violently invaded Hermioneās privacy about her romantic life - an article that called her a slut and that the whole damn wizarding world could read - to humiliate her.
And you know what - Snape lost the right to any privacy about Lily when he called her a slur and humiliated her publicly in the front of the whole school, and certainly when he got her killed.
Harry has every fucking right to his motherās story. He has every right to know about the man who is responsible for his motherās death and how that man treated her and victimized her.
Lily isnāt there to tell Harry her story because of Snape. She isnāt there to tell him about the heartbreak and despair she felt when she was betrayed by her best friend. Lily and her memory is erased from history because of Snape. Snape fucking owes Harry that memory.
Snapeās response to being faced with his OWN biggest mistake, his OWN horrific fascist violence against his muggleborn best friend, is not to take responsibility for it, but to get physically violent with her son and stop doing his fucking job for the Order in teaching Harry a life saving skill that is absolutely crucial for their mission, which eventually leads to Harry being lured to the DoM and Siriusās death. Snape canāt make this one sacrifice (which can hardly even be called a sacrifice). He does the same thing in HBP when Harry uses Sectumsempra - heās faced with a Dark curse he invented and certainly used in combat to torture/kill victims as a DE, and used enough at Hogwarts that it became known as his specialty, and responds by deflecting blame onto the Marauders by showing Harry detention slips of their petty crimes and psychologically torturing Harry over his grief over Sirius. He also only doesnāt sell out Harry over the Princeās book because heās hiding the Dark magic in it from Dumbledore, again being unwilling to acknowledge his Death Eater violence.
None of this is Harryās fault. Itās Snapeās for being an awful abusive teacher. Even when Snapeās behavior is at its tamest, he does still repeatedly insult Harry, and these lessons start with Snape yet again insulting Harry and Harryās dead father in Grimmauld Place. Yes Harry doesnāt practice, but if it hadnāt been someone who abused him for five years teaching him, he wouldāve been far more inclined to practice. Likewise, Harry not believing that Snape heeded his āheās got Padfoot in the place where itās hiddenā warning and therefore tearing off to the DoM was in part due to Snapeās abusive behavior - why would Harry believe Snape had anything but the worst intentions after how heās treated both him and Sirius? Harry also doesnāt anticipate viewing a personal memory of Snapeās when he enters the Pensieve, he thinks itās stuff Snape is hiding about the Order. Harry respects Snapeās privacy and doesnāt tell Ron and Hermione about the memory (he also respects Nevilleās re: his parents).
And Snape had the nerve to accuse Harry of being lazy and not working hard enough. Responding like that to the memory of calling your best friend, who you personally got killed when you joined a fascist terrorist group, a filthy little mudblood isnāt working hard to atone for your sins; itās taking the absolute easiest, laziest, most cowardly way out.