CompizConfiguration Settings Manager's interface isn't great, but you really shouldn't use the 'Advanced Search' as an example. The window you are showing is the final result of the actions. In the beginning it only has a few UI elements. As you search and select stuff, more tabs and boxes come into view. So while you're using it, it isn't as bad as that screenshot shows. Also, that is not the default search. There is already a simple search on the main page of that program and you have to choose Advanced Search to begin your journey to the screen you depict.
Really, there are more legitimate things to complain about. The fact that the means of activating different effects isn't consistent, for instance, really annoys me.
Example: You can set a Screen Edge/Corner, or a Mouse Button or a Keyboard button for most plugins in the plugin's own dialog. However, for Show Desktop, you have to go to the General section because the Show Desktop plugin only has other settings in its dialog.