everything was mentioned by others already (0 screentime for other men, meh cast and the fact that everything was about Gwanhee was just terrible)
However, the most irritating thing for me personally was basically only one way to get to paradise - to win a game or to come late. If I remember correctly, in the other seasons, you could've just matched by choosing each other. I'm giving 7 for one particular couple which had 0 opportunities given yet made it to the end. I felt sorry for them throughout the whole show tbh.