Looking for anime recommendations that will absolutely wreck me emotionally

I’m looking for something that won’t just make me tear up, but will actually leave me staring at the ceiling for an hour after the final credits roll. I want that specific brand of "gut-wrenching" where the story feels heavy and the characters’ struggles stay with you long after it’s over.

I’ve explored a few of the mainstream classics, but I’m ready for something that dives into deeper, perhaps more cynical or philosophical territory. I really value narratives that take a sharp, analytical look at human connection and the isolation that often comes with it. Whether it’s a slow-burn drama that takes a dark turn or a psychological tragedy, I want the emotional stakes to be high and the pay-off to be devastating.

What are the shows or movies that left you feeling completely hollowed out? I'm ready to be destroyed. Thanks for any suggestions!

p.s. sorry for using ai to generate such a long thread