About Qt designer

[HelloDan]

Hi friends.

I find the Qt designer is very difficult to use. It's very easy to run out of order. for example, I want to setup a dialog like this:

Three QGroupBox in the leftverticallayout.
two QPushButtons in the rightverticallayout
I want to setup them as a mainlayout. But horizontallayout and gridlayout both fail, their size never meet my thinking.

Do you have any good advises? Thanks

I have attached my ui file.