These are not feel good movies at all but I think really send important messages. Not for kids, but at 16+ would be good. There's very important takeaway messages in both.
Requiem for A dream is a very good film. Its quite similar to the much older German film "Wir Kinder vom Bahnhof Zoo" (We children from the station zoo). The original version has a quite weird style in terms of how it tells the story but its still a very good film. Can only recommend it to everybody. Heroin one hell of A drug that can quite easily ruin everything.
Could never bring myself to go through it again, despite how utterly beautiful it is.
But my favourite thing about it is that it was originally a double bill with My Neighbour Totoro. Imagine seeing those two back to back. You’d get some serious emotional whiplash.