It's set during the Irish Civil War. Someone else in this thread posted a Wikipedia link to an article about this war. If you read some of that you'll begin to understand what the film is about.
"What is art?" I started to enjoy film more when I understood that the best directors are just telling a story and not don't care if you like it or not. Of course you are free to hate it.
The same applies to any form of art.
If you want a movies easy to enjoy, there's the superhero blockbuster movies and Star Wars, I guess.
I mean, you're not wrong, but the truth is, anyone can tell a story. I hear tons from drunks at bars and homeless folks in my city.
What makes a director/story writer so exalted as to have better stories?
The best movies, IMO, are those that can tell a story while drawing the audience in. Whether through comedy, sadness, shock, etc.
This movie was just a person telling a very weird story. Taken at pure face value, and ignoring the actors' talent, it sounds more like a story a random drunk person on a bus would tell.
I understand art is completely subjective, so I'm in no place to say you're wrong. But it's kinda dismissive to tell someone who hated it to watch superhero movies. Now -those- really shouldn't be made.