The Birds was aggressive. Literally everything about it. Let's just take a look at some of the shit that went down.
1. The main character stalked a man back to his home town and took a boat to his house so she could sneak in the back door and leave him some birds. She thought it'd be cute.
2. This poor girl was attacked at her birthday party.
3. This fireplace shat birds.
4. So many birds.
5. This bird killed itself.
It was trying to peck some guy's eyes out. Another bird got to him. I'm not even going to include that image.
8. The birds attacked this flock of children.
9. Shit got OUT. OF. HAND. Really it did.
10. They tried to PECK THEIR WAY IN.
11. And SPOILER ALERT the birds won. They fucking won. The people just had to leave town. It's a bird town now.
I fully get why people have been traumatized by this film.