Voting today is a complex and costly process. Hence, it cannot be carried out frequently and hence the accountability/ feedback loop is slower.
Imagine if we could conduct voting in a day (even in large democracies). We would be able to remove bad representatives faster.
That would be horrible. "direct democracy" does not work (Switzerland is also a representative democracy), practical policy making requires some domain knowledge, patience and the ability to make compromises that the Internet mob could not possibly deliver. People are generally very good at judging the trustworthiness of other people, however, and at being critical about other people (rather themselves). Both traits work well for a representative democracy.
just have a test we can take to illustrate competence in a domain. Passing the test grants us the right to vote on laws in that domain.
Then, those who represent us are those who have illustrated the intellectual capacity to make good decisions.