Sorry, but this report is a mess. I can't grade it as it is. But I'll help you make it good.
First, the screenshots need to be redone. Not a single pair matches. Also, above (or below) each screenshot should be both the resolution and the aspect ratio mode you picked.
Also, I'm not convinced that the game is necessarily stretched. I suspect that choosing the right aspect ratio may have something to do with it. For example, this guy
looks a LOT fatter than this guy
even though both of them are at a 16:10 resolution.
Here's what I suggest doing to start. First, find some part of the game where the camera is static; it doesn't move. Take four screenshots.
One at a 4:3 resolution, aspect ratio auto.
One at a 4:3 resolution, aspect ratio 4:3.
One at a 16:10 resolution, aspect ratio auto.
One at 16:10 resolution, aspect ratio 16:10.
With these, I'll be better informed to advise you on how to approach improving the report.