Sometimes, Sam Winchester hated Dean Winchester.

He knew it was wrong to hate his brother, who had done so many things for this world, but he couldn't help it

Dean had everything, Sam still loved him, but sometimes he hated him

Maybe it was because Dean had Cas, yet Sam had no one

Dean was able to do things Sam could not, for instance, protect the ones he loved

Dean was able to save Lisa, Sam wasn't able to save Jess

Sometimes, Sam hated Dean