VB was kind of crap if you wanted to do a scalable UI.
Qt has a visual designer that's less intuitive to use than VB was, but on the other hand you don't need to write all that resizing code by hand, or to be stuck with a fixed size window.
Maybe fixed size window is ok for most applications? These old VB6 apps outlived every trendy modern framework. Just shows there's a different between what users care about and about what developers think users care about.
VB forms were something that was very easy to get started with, and then took forever to actually polish. If you wanted to make things pretty you'd spend ages adjusting positions by hand.
If you want to make a fixed layout you still can with modern tools. The difference is that instead of painfully adjusting everything by hand because something is longer in Spanish and doesn't fit, you can just resize the window in the IDE and be done in 10 seconds.
This was basically resolved by the time of Windows.Forms. The biggest issue at that point was high-DPI compatibility - I haven't used Windows for long enough to know whether that is still an issue.
Yeah it was indeed. You essentially had to code event handlers to react to window size changes in which you repositioned your UI elements to maintain/scale your UI. I remember some of the first 'library' code I ever wrote as a professional developer was reusable "layout" handlers for VB3. Good times!
Qt has a visual designer that's less intuitive to use than VB was, but on the other hand you don't need to write all that resizing code by hand, or to be stuck with a fixed size window.