Odpověd od steam support, takže víc dělat nejde.

Hello,

I understand that you would like to see your games separate from your brother's games in your shared library, however in the new Steam library the games are organized alphabetically, you cannot see them separately. As a workaround you can create collections and add separate your games from your brother's games using this option.  In order to create Collection just  Right click on the game > add to > + New collection  With that said, I would like to thank you for the feedback on the new Steam Library. I'll make sure that this is passed on to the development team.  You can also share any opinions, suggestions, or ideas in the official Steam  Discussions. Our development team is actively following these discussions.  Thanks for using Steam, Jessy