What do you MEAN the glass, the porthole, the only way Simon was able to see out into the world and into the blood ocean was made from scavenged parts of Filament Station? The only way Ava and the rest of the crew saw him was literally through his biggest regret, the reason he ended up there. And he pleads for someone to listen when he says Filament Station wasn't supposed to end that way, but he cannot be separated from it.
The only way he's able to be viewed is through the remnants of a station where 62 people died, and the only way he can see out is through the ocean of blood. And only when he chooses to break that glass is he finally choosing freedom in a way he fought against. He just wanted to live, and it was too much to ask for.














