Sonos have one of the worst music apps I have never seen in a desktop

I'm sorry my English is so bad
No worries. It's infinitely better than my Spanish.

- Have access to my ridiculous library in a small column

The 3 panes are re-sizable, at least to a degree.

- Not being able to order my library by date of the disc or by news in my library, cities, etc.

That's a not infrequent request. Unfortunately Sonos doesn't store a date tag, and given that index space is severely constrained to maximise track capacity it's highly unlikely that any changes will be made in this area. Many users simply prefix the album name with the year.

- You can not choose a start view with the library when you start the application.

Actually I agree this would be nice. The controller remembers the last room, so why not a menu position.

- Not be able to search all services at once.

Agreed it would be a nice option to have an 'all sources' in the dropdown menu.

- Not having a decent podcast service

That's nothing to do with the controller. Services are being added all the time, but it takes a willingness from the service provider to interface to Sonos' open API.

- Can not hide the view rooms if I only use it in one or do not want to see that information.

You can squeeze that pane, but not eliminate it totally.

- Not able to change or choose the configuration of what I want it to do when double clicking on a song or folder (substitute queue, queue, put at the beginning of queue ...)

That could be a nice option too, at least for the Desktop controller. Some would also want that kind of flexibility in the iOS/Android controllers.

In the end up to the volume seems to me that it has a little progressive use and coarse

You can in fact adjust the volume by 1% at a time using a mouse pointer. The shortcut keys or mousewheel move it in increments of 2%