Variety's Maureen Ryan wrote that the show "feels like a Spotify playlist in search of a reason to exist".
The 10-episode season wrapped in August with the finale bringing in just more than 500,000 viewers, according to Nielsen's "Live +3" ratings.
In a post online, Crowe wrote: "Thanks to Showtime and JJ Abrams for the opportunity to make the one and only season of Roadies. My mind is still spinning from the giddy highs of working with this epic cast and crew.
"Though we could tell a thousand more stories, this run ends with a complete 10-hour tale of music and love."
Castle-Hughes took to Twitter to acknowledge the end of Roadies, writing: "My [Roadies] family. I am so proud of what we achieved. Love you deep! Rock on forever mother******s!"