Just some tips:
Use interpolate on the Player Rigidbody (in the Elevator to get rid of the Jittery movement).
If you are using animation events for the Footsteps, space them out more, or put in a bool check in your Footstep Script, to check if a sound is already playing, this way you get rid of the Footsteps sounding like knocking, it's quite distracting.
You are playing the Run Animation for the Camera on Button down, check if the Player is even moving, and put some "exit time" in it's Animator to -> walking and to -> running, so it doesn't start/stop abruptly.
Set your "Scare" Triggers further away, and do not overuser the same animation every time.
The Library Shelves change Style mid game/don't get fully loaded (LOD Issue?).