I think idealists often get into politics as well, but they're not cold, calculating and power hungry enough to get into the important positions.

Not only that, but one rotten apple can kill decades of work (see Trump, Putin).

Start by just attending a some meetings of your local school board, city council, etc. Sit, watch, and maybe take notes. Compare the reality with local press coverage (if any) of it. Try analyzing the social dynamics. Talk to other ordinary citizens about it.

If the only people paying real attention to gov't leaders are the greedy and power-hungry, then few decent people will run for office. And very few of those win.

so then let's just give up altogether?