Furious fans of Love Island complained about the dating reality show to TV authorities more than 5,000 times last week.
Viewers have been angered by several moments during this summer's run, which has seen Love Islander Toby Aromolaran hit the headlines with his eccentric behaviour.
It was the treatment of Teddy Soares during the Casa Amor twist that particularly angered viewers, however, as figures from broadcasting watchdog Ofcom show 4,330 complained that a postcard trick was unfairly cruel.
Teddy particularly fell foul of the twist as his partner Faye Winter was shown a picture of him kissing another woman while in Casa Amor - an embrace that was part of a game of Truth or Dare with some new girls, rather than voluntary.
Faye then initially split with him to couple up with a new entrant. More than 600 complaints were also made two days later after the recoupling episode in which Faye left Teddy, according to Ofcom's weekly report.
She had slammed him in scenes viewers found uncomfortable as producers were accused of "setting him up" and causing the love split.
Teddy ended up expressing his guilt over his smooch with new girl Clarisse and even slept outside in the villa garden all week while most of the other boys shared a bed with one of the girls.
Happily, the couple have now reconciled - and are now one of the favourites to couple up and win the whole series, but viewers still felt the need to vent their fury at producers.
Love Island was the most complained about TV show in the U.K. last week - with a Channel 4 Dispatches documentary on family courts the only other show to draw more than 100 complaints.