The screen is too Wide (Minecraft)

[VwilsMAN]

Hello! Whenever I open OBS to record Minecraft, the footage is too big for the window, so I have to scale it and morph it until it looks like in the attached image. However, the rectangle in the attached image looks very bad. Is there any way I can fix this?
(Image attached shows you what I mean)

 

[VwilsMAN]

I would like to add that the resolution got fixed right after my GPU had a driver update yesterday, but is back to being terrible. I will attach an example of the fixed and unfixed resolutions.

(Fixed Version)

(Unfixed Version)