Instagram crashes the second I open the camera. Everyone else's works fine.

Camera-only crashes usually point to three things: a permissions glitch (revoke and re-grant Camera + Microphone permission for Instagram in system settings), low free RAM or storage (the camera module is heavy, clear some space), or a bad update. If a recent update triggered it, roll back to an older version until they patch it. Also test your normal camera app to rule out hardware.

This thread is really useful, bookmarking it.

Mid-range Android here and the re-grant permissions trick fixed the exact same crash for me. Try that first, it's the quickest.

Had no idea about this, thanks for asking it out loud.