Brian May thinks The Voice is an "insult to music".
The Queen guitarist blasted the TV talent show which has editions across the world, including the United Kingdom, America and Australia.
The 65-year-old feels that the programme is disrespectful to performers because of its format.
"Sorry, hate to be negative but The Voice is the dullest, dumbest, most depressing show on TV," he wrote on his website. "It's the ultimate insult to music and to performers."
The musician feels bad for contestants as the celebrity judges won't even look at them while they belt out a tune.
The brutal process makes him feel ill if he watches the entertainment show.
"Every time I catch a glimpse of young singers busting their guts trying to win somebody's attention, who is rudely sitting with their back to them... I feel sick," he continued.
Christina Aguilera, Cee Lo Green, Blake Shelton and Adam Levine appeared on the original version of The Voice in the United States. Shakira and Usher stepped in to temporarily replace Christina and Cee Lo in the most recent fourth season.
Ricky Martin, Delta Goodrem, Good Charlotte's Joel Madden and Seal are starring as mentors on Australia's current series. Ricky took over Keith Urban's chair when he switched to rival American Idol.
Tom Jones, The Script's Danny O'Donoghue, Jessie J and Will.i.am appear on Brian's home country version in Britain.
In the early stages they pick vocalists as part of a blind audition before coaching them in teams.
"I hate seeing the great Tom Jones shoehorned into this scenario," Brian added. "I hope this vile show dies a natural death very soon."