game's not dying, but playerbase is quite low right now so if you want fast queue you have to try to play in some "full" moments like EU afternoon / evening or US evening/night , or in weekends nights, where there are more than 30 players queueing almost everytime.
It is really hard to find games in the early afternoon in europe/night time in america. But other than that it's solid. 5 min max wait time for ranked. Custom is as stated from dice pretty rare.
Insert meme of of dude pointing to his head. They can not see low player base if they can not see any players
“I do not see who is online with my eyes; he who rank dodges with his eyes has forgotten the face of his father (sok). I see who is in the lobby with my heart...."