The legendary guitarist feels sorry for Sir Tom Jones, who serves as one of the judges, and admits he feels "sick" whenever he watches the pop competition.
In a post on his website, May writes, "Sorry, hate to be negative but The Voice is the dullest, dumbest, most depressing show on Tv. It's the ultimate insult to music and to performers.
"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.
"I hate seeing the great Tom Jones shoehorned into this scenario. I hope this vile show dies a natural death very soon."
The British version of the show also features The Script star Danny O'Donoghue, pop star Jessie J and the Black Eyed Peas' will.i.am on the judging panel.