The game tries to imply you're playing the game on an emulator, which wouldnt make any sense with the low effort filter put over the entire game
Maybe the player is playing the game on a crt display in-universe?
I feel like that's intentional though, it's supposed to be like you're playing on an old school display
Even if that was the case, the filter doesn't make much more sense when you realise the screen is shaped like a concave display and not a convex display
Ehh. It doesn't bother me personally, but yeah I can see why it's annoying.