I'm jealous of my dead brother.
What is your reason for being jealous of him after he died.
He is lucky that he does not have to be alive in this world anymore.
I'm sorry you feel that way but I'm sure your brother would feel otherwise. Be grateful that you aren't dead because he's likely jealous that you're still alive and get to continue to experience the things he's missing. Maybe he even enjoys those things through you now that he's gone and if you joined him, he would be extremely sad.
He's nothing but ashes now...
Try to understand that there are many joys to this world. You may simply be overwhelmed by negative thoughts at the moment which is ok, but just know that you may feel much better after receiving help from someone else. Maybe a therapist or simply a family member could lend an ear.