It's actually really easy for me to like Regulus and hate Snape.
And before people come out of the woodworks with claims that I am classist or whatever other ist they want to put onto me.
Growing up poor doesn't excuse the fact that Snape bullied children. [I grew up poor and was bullied, never once have I thought, 'let me go bully people']
He singled out Harry because of a decade old grudge against James. Rivalry or bullying, either way you look at it, Harry isn't James and should not be the one paying the actions of his father just for the sin of simply looking like him.
He outright tried to poison Neville's toad because the kid wasn't perfect at a subject [the kid was 13, he's not going to be an expert potion maker] and took house points away from Hermione for helping Neville not poison his pet.
He mocked Hermione's appearance to where she permanently altered her face, she permanently altered her face following that scene.
So yeah, I don't care that he was on Dumbledore's side and a spy. He was a grown ass man bullying children. In my opinion, the fact that he was bullied as a kid makes it worse, because how are you going to put someone else through the shit you went through.
We don't know enough about him, what we are given is a fragmented story from two very differing perspectives, yet they don't outright contradict one another.
It's more than likely that two things can be true at once. Sirius doesn't hold Regulus from the same malice as his parents, he simply calls him too soft, emphasizing how he was following their lead and never thinking for himself. [Unlike Sirius who was always a rebel]
Yet the first time he thinks for himself, the first act he does that directly goes against his family's ideals? Is undermining Voldemort in a way that nobody will know. He left the note for Voldemort to find, not for glory, not for redemption, he faced death for the chance that Voldemort could be killed for good.
Sirius thought that Regulus was just like their parents, but his final moments was him being more like Sirius than ever before.
