I think we agree then that the system is not perfect, though there is certainly no easy answer to fixing it. Also that in the wider perspective- it's been a relatively successful experiment.
I take your point on representative democracy, and it's been the main caveat to true democracy politicians have always cited; that we can't trust ourselves to make the best decisions.. I'm just not sure, perhaps to paraphrase Churchill, we might make the least worst decisions.
'we the people' don't have votes, voting records, party affiliation, physical appearance, media savvy, favors, etc etc to affect our influence and decisions.
I think there is a good reason juries are stocked with 'we the people' and not legal experts, because an unbiased amateur beats a biased professional any day.
Part of the rationale for representation was also to do with the logistics of collecting individual votes on varying issues across such distances, todays technology makes that argument redundant.
Maybe it comes down to - who would you trust more; the average citizen or average politician? I know a lot of people, friends and loved ones who would vote differently from me, but out of their own honest opinions, so I'm fine with that, maybe they're right and I'm wrong.