I have to concede that you are for the most part kind of stuck with what you get. I think part of the problem is the UI scaling, which is default 125% for me, which ... well, kinda late now right?
https://i.imgur.com/BNd1k2i.png
I shrunk the one on the left to 75%, which should closely mimic 100% scaling on 1440p. I think that looks better. I don't know if you can make a window disregard UI scaling though.
On the bottom, a slightly more compact horizontal view.
The autohide is nice, but I keep struggling to find a good spot to put this useful mod window at, as mentioned before.