lol he's become more gratuitously evil over time. It made a lot more sense when he just had a poor sense of taste and was resentful and rigged a vote and maybe left a bullying message for Asuka.
But him putting washing liquid in the tomato source and possibly murdering Asuka risking himself going to jail or getting sued. how is that a good plan???
The other thing I find funny is that the mangaka draws him with thin asian eyes because he's evil lol.