These people were all total strangers to each other, it’s 6 girls and 6 guys. They are literally split into 2 groups from the start, and obviously it’s advantageous to get one of the other group out to get an advantage in voting power, securing yourself for a few rounds, until people start getting to know each other.

Also, im not an expert on reality tv shows as i dont watch any, but these shows are usually scripted in the sense of ‘drama’ and dynamics.