I dislike GTK; my opinion is that Xaw is better in many ways. GTK has problems including bad designs of many things including file selection dialog box, scroll

I dislike GTK; my opinion is that Xaw is better in many ways. GTK has problems including bad designs of many things including file selection dialog box, scrollbars (which are not always consistent), bitmap fonts sometimes don't work properly, always uses Unicode and although you can enter Unicode control characters they are not displayed while editing (which makes it difficult to use), some things are not documented well, configuration is difficult, kerning in editable text, etc. So, I do not use GTK in my own programs. (Some people say that if a program does not need to be documented then it is easy to use, but I disagree; a program is difficult to use because it is not documented well.)