I think it's probably because a lot of people are embarrassed to run for class representative rather than people feeling like it's just too troublesome.
この場合、次のような言い方ができますよ。
ーI think it's probably because a lot of people are embarrassed to run for class representative rather than people feeling like it's just too troublesome.
「面倒くさいというより、多分学級委員に立候補するのが恥ずかしいと思う人が多いからだと思う」
to run for ...「…に立候補する」
class representative「学級委員」
ご参考まで！
カナダ 
