Look, I shouldn't have to worry about these things.
Maybe this is the fundamental problem: that, as a society, we have collectively decided that we shouldn't have to worry about government.
This begets two problems. First, the exact problem you're complaining about: that not enough money gets spent on things, because people don't think they should have to worry about it, but they also don't want to pay more in taxes so that the government can pay someone competent to worry about it for them.
Second, you end up with the people who have more time on their hands (generally, the people with more money), or who care significantly more (generally, the people at the various fringes), being the ones who are most involved in government. The latter of those leads to divisiveness, and the former leads to monied interests having a disproportionate say.
So, in the end, I kind of agree with you that it would be nice not to have to worry about these things. They're the sort of thing that a well-run government should take care of on its own. But the way we as a society think about and treat our government has been pushing it in a direction for a few decades that would inevitably lead to just this kind of outcome.