Many of the reality stars fellow Love Island stars quickly took to social media to express their shock and sadness.
However many of them also expressed anger and that a ‘enough is enough,’ as they claim that they are left abandoned once they leave the reality show's villa, having to deal with instant fame alone.
Former Love Island contestant Montana Brown paid tribute to Thalassitis on Instagram saying she wished she had done more, and revealing he had turned to self-help books in recent months.
She said: 'Now I know you were in a dark place a few months back and I thought you were past it and that you were on the up.
'I got you to buy (self-help book) The Magic, you wrote down your gratitudes, you had the pictures of your family in your car to remind you to be grateful for them.
'I just don't know how I didn't notice... I am absolutely heartbroken that I couldn't help you'.
She added: 'I've thought long and hard about what I want to say, I've woken up and unfortunately this wasn't just a nightmare so this is to you Mr Thala.
'Firstly, I'm so angry at you for doing this because you are so loved by so many people and I just wish you picked up the phone so we could've sorted this out. This didn't need to happen.
'Secondly, it annoys me that you were so misunderstood. 'Muggy Mike' was your stage name and let's face it, the ladies did fall at your feet BUT everyone had this impression of you and you were literally the opposite you were one of a kind.'
Former Love Island star Dom Lever criticised the show’s producers for their lack of support once contestants leave the villa.
Malin Andersson, who lost her daughter earlier this year also hit out at the show and said she 'wouldn't have been able to cope' after the show if she didn't have a 'strong head on her'.
She said: 'If I didn't have a strong head on me that my mum passed down to me, I wouldn't have been able to cope with this all. But not everyone is like this. PLEASE IF YOU FEEL ALONE, OR SAD, OR STUCK REACH OUT TO SOMEBODY!
'Nothing when my mum died. Nothing when Sophie died. Change needs to happen.' She also urged the show to 'wake up!' and said that enough was enough.
'I got flowers from the producers when my daughter died. No f****** phone call. No support, or help.'