i hear you but still, snape was also 15! and an awkward antisocial loner, which sirius was definitely not, he had a much more stable support system, &from my interpretation of his family life the abuse he suffered was much less extensive &direct than snape. and i always felt his hatred of snape was more complicated than that, idk how to explain it. like, by destroying snape he would destroy what his family almost made of him. a sort of overcompensation if you will (and yeh im loving the meta!!)
Nooooo friend, you are discounting emotional abuse, do you remember the insanity of evil Matron Black yelling insults whenever her portrait curtain flaps open? Can you imagine having that as a real live mother??? For the first sixteen years of your life? Maybe I sympathize with Sirius too much on that account, for I was not able to withstand even sixteen years of abuse, once ALL of my mother’s verbal/mental/physical abuse was heaped on me instead of my dad deflecting it, and I was becoming sick/trying not to exist anymore because of it, my dad fought in court to get me legally emancipated from her and I got to live with him at age fourteen. Remember how Mrs. Black tried to brow beat Sirius into submission and basically destroyed all his self-worth since he didn’t live up to her expectations, until he couldn’t stand it anymore and left and at that point he was blasted off the literal family tree tapestry? And let’s not forget the only reason he bullied Snape was in response to Snape’s association with a pureblood organization that existed to destroy his friends, and Sirius has Gryffindor loyalty in spades and the fact that Snape was obsessed with the marauders and determined to get Remus kicked out/punished for ‘sneaking out’ every month. Snape has a sad and horrific background story, but his antagonism can’t be ignored.