Mouse Input Delay?

https://steamcommunity.com/app/3065800/discussions/0/798964126635322029/?tscn=1773718279

This is an extension from a Steam Discussion I posted in regards to experience significant mouse input delay.

Essentially, the game is borderline unplayable to me because there is a substantial delay in mouse input, when doing essentially anything in the game. For the first 0.5 seconds, the mouse will respond normally, but then it feels like all of my mouse inputs are delayed and then stacked on top of each other. It makes it so I can't correct the direction that I'm looking in, and I'm actively fighting with the game. I've tried both my standard, wireless mouse (Logitech G602 with a bluetooth receiver) and a regular wired mouse I had lying around, and the problem is the exact same for both. Marathon is the only game where I'm experiencing this problem, and I thought this would be fixed with the most recent update, but it still persists. Is anyone else having this problem? I'm considering refunding the game, and buying it later when its fixed because the game is literally unplayable for me the way it is now. I tried reinstalling the game, and made sure it was running on my SSD as well.

https://www.youtube.com/watch?v=OGSdWPa6U9g

I also captured gameplay of what it's like while in game. I'm not sure if it's a plug-in or polling rate issue, but my mouse doesn't go beyond 500hz, so that's not the issue. While launching the game, I did get this BattlEye Log, which I feel could have something to do with the issue. 

22:15:57: Starting BattlEye Service...
22:16:00: Updating...
22:16:03: Launching game...
22:16:27: Note: File blocks can be ignored if they don't cause problems with the game.
22:16:27: [INFO] Blocked loading of file: "C:\Program Files (x86)\Common Files\Portrait Displays\Plugins\DP\MsgHook64.dll".