You either win big enough under the current system, with its system problems, or you never win to improve it.

Imagining better systems before doing that is just a form of xkcd’s nerd sniping.

And the biggest challenge to representative government might well be that most people are terrible at engaging it productively. Voting is the bare minimum and most people don’t vote (let alone organize and lobby effectively). Some significant portion of those that do vote can’t correctly draw a line between policies they’d like and candidates who intend to work on delivering, and that’s before we get to the portion of the population that may not correctly anticipate policy outcomes or even really understand policy as a concept.

The system has actually been functioning surprisingly well considering, and as catastrophic as recent elections could be seen as, the outcome arguably represents a reasonable degree of fidelity to the input from the electorate.

If we still hold free and fair elections, the task of those who want representative government is to change enough of the electorate first.