wxWidgets: memory of a month(+list of complaints)

Recently, with some motivation, I left Qt and used wxWidgets for a while. I used Code::Blocks, applied Bind<>(), and so on. I enjoyed the coding, but eventually I returned to Qt. During the time, I experienced......:

• If the application is frozen, task switcher doesn't work at all, whatever it is - Alt-Tab, Windows-Tab, taskbar click..... Nothing works. This is first time I've ever seen something like this
•  You need some time to be accustomed to properly use wxDateTime. On calculation you use wxDateSpan, and its structure is confusing
• In wxGrid, if you have too many rows ans set the layout side to 1 or higher, the grid wraps the entire window(......). The widget seems to calculate its size based on the sum of column widths and row heights. It must be a bug
• Unicode adoption seems not working properly. I converted interface strings to UTF-8 using wxConvUtf8 and tried to put the string via SOCI, and Firebird complained whenever the string has some Chinese characters
• It seems to be due to Windows control itself, but it's too slow. The fame of GDI is not void.

And above all, Code::Blocks broke down from time to time, and well, just guess what it would feel like if you experience all above.
For your reference, my development environment was as follows:

• wxWidgets 3.1
• MinGW-w64 6.3.0 release 1
• Code::Blocks rev10922(built at Nov. 20th. 2016)

Now I'm back to Qt, and I'm porting all my wxWidgets apps to Qt now. The apps are faster, and it's more convenient. Viola!