I don't think there is any need for hate or arguments, but as someone who also does UIs for a living, I do make a point of ensuring that, within bounds, the user can access all of the user interface functionality whatever the resolution of their screen. If it is too small to display, put a scroll - its an ugly work around but at least it enables functionality on a reduced screen.
The resolution is not 'too high', it goes up way higher than that, and some people have bad eyesight or high res screens (my work laptop is set to 250% but it is a 4k screen) but if it is a problem not being able to see the user interface, it might be worth mentioning in the manual or support documentation that the screen has to show a minimum size to be able to see the current UI, so people aren't asking how to get it to work on a completely unrelated forum.
But you say it was made with QT and I have had to work with QT, older QT so I know the issues.
As an aside, the UI for the 12 step works for me, but then it is not something I go back to often as the 12 step works pretty well the way I set it up,