Why Don't You Like Snape?

Why don't you like Snape?

Here's a list of reasons:

He told Voldemort about the prophecy

Neville, who's parents were tortured to insanity. His biggest fear is Snape. His teacher

He tried to have Trevor killed

It's outright said he only cared about Lily, not James (if I was in his position, I wouldn't either, though, so I can forgive him for that) or Harry (that's not forgivable)

He told Voldemort about the prophecy

Snape didn't even try to teach Harry occlumency. He just invaded his personal thoughts and told him to keep him out

Obsessing over a dead woman does not give you the right to a) rip apart the picture she'd given Sirius of her laughing with her son and husband just to keep the part with her in it to yourself and b) take the last part of her letter and pretend she actually cared about you, a man that called her slurs and had been actively trying to kill people like her.

He told Voldemort about the prophecy

He was prejudiced when it came to blood purity

He created dark spells (sectumsempra, anyone?)

He told Voldemort about the prophecy

Snape didn't even bother trying to wash his hair

He rubs me the wrong way