Hello,
Deepin seems to be in a broken state. In order for me to have the dock, i actually have to restart the WM with
deepin-wm --replace &
otherwise i have just an empty desktop and i can access the right click menu only.
GTK+ apps have no title bars, nor window decoration to resize them, and Qt apps are inmutable …
Unless there is a known issue upstream and a fix there, i don’t see how you could.