I love Linux, and I use it almost every day (Debian), but only ever as GUIless servers, which it's amazing at. Just hope one day a team with design and ease of use will make a distro that "normal" people can enjoy to use. (but you would need other apps that look and work great in it too, which I fear will be the harder issue to tackle)
The most recent example I can think of that I had this issue with is Ubuntu MATE last week.
And I get it, this is a very nitpicky issue, but in my mind, it's a basic operation that both macOS and Windows do really well and as a user switching from that, it's a little annoying.
https://www.reddit.com/r/kde/comments/6963sa/plasma_tip_you_...
If you watch the gif in plasma basically you hold down the alt key and right click and drag to resize from anywhere on the window. Likewise you hold down the alt and left click and drag anywhere on the window to move it around.
Further there are hotkeys to place the window on a segment of the screen example: the left/right/top/bottom half or one of the corners. I think there is a function for sizing it to thirds as well. For me this virtually replaced any manual resizing even before I swapped to using a tiling wm where there is zero resizing.
I just tested this on cinnamon and this works there too. I don't know if it works in mate.
And using ONLY the mouse is the common way on a desktop for common folks where surprisingly many still don't even know strg + c