Some 52% say it was unacceptable, with 28% saying it was acceptable and 19% answering “don’t know”.
The majority of Britons also think ITV has done the right thing by cancelling the show: 56% say it was the right thing to do, 29% say it was wrong, with 15% unsure.
ITV has announced the show will not return after a guest reportedly took his own life after appearing on the programme.
Steve Dymond’s body was found at an address in Portsmouth on 9 May, a week after recording the show.
During the episode, which has not been aired, he had taken a lie detector test to convince his fiancee he had not been unfaithful, but was told he had failed.
MPs have since announced an inquiry into the wider issues surrounding reality TV and duty of care.
The company had previously faced criticism following the deaths of former Love Island stars Mike Thalassitis and Sophie Gradon.
The public are more divided on the treatment of Love Island participants: 26% believe the way they are treated on the show is morally acceptable, while 31% think it is unacceptable, with 42% saying that they don’t know.
Younger people – the target audience for Love Island, who were much more likely to have an opinion on the show – think contestants are treated reasonably, however.
Four in 10 of those aged 18-34 (38%) say Love Island treats its stars acceptably, against 29% saying participants are treated unacceptably, and 32% who are unsure.
In contrast, 37% of those aged 55 and over think they are treated unacceptably, 13% think the way the show treats its stars is acceptable, and 50% don’t know.
Sky Data interviewed a nationally representative sample of 929 Sky customers by SMS on 15 May 2019. Data are weighted to the profile of the population. Sky Data is a member of the British Polling Council and abides by its rules.
For full Sky Data tables, please click here.