I'm sensing a lot of negative emotions in the world right now. Time to do something positive.
For each like that this or one of the subsequent posts on this thread I will tell you about something I like. Only restriction is it has to be something you can enjoy as well so stuff like my family or friends are not something I'll post ( sorry, but you'll have to take my word that they're awesome )
Squeezebox (Logitech)
https://en.wikipedia.org/wiki/Squeezebox_(network_music_player)
I have yet to find a music library program that has grown with me and my needs like the Squeezebox. I've been able to have my entire music library with me at home, work, and in the coffee shop without much difficulty. Getting things set up is a bit fiddly but once it's working it's a thing of beauty.
@Zveryok I'm not in the market for anything new. This literally does everything I need.
@craigmaloney does mpd suit your needs? It's can be used as multi-user server for that need, but i'm not sure about it