"Even if people do make donations and volunteer, those are bound to decline during lean times, or in poor neighborhoods."
Both of which are mainly caused by government regulations destroying the market.
"Teaching is a full time job"
It doesn't need to be. Everything a kid needs to learn can be learned in a small number of hours. All the rest of the years in school are wasted-- unless you like the government extremist indoctrination they get. That's what takes so long.
"Taxation also helps even out the burden of funding public projects,"
A lot of those projects I can't afford, don't use, and don't want. Why can't I opt out? I'm not asking to get anything for free; I'm perfectly willing to pay for what I use. I just want the option to opt out of the things I don't want, and to shop around for the deal I like best on the things I do want. I don't like being forced to use your monopoly.
"I'm glad I got up early and went to school."
Yes. many people come to believe that because they were abused in a certain way, everyone else should be abused similarly.
"It taught me how to read, write, type, think critically about science and history, socialize, and put forth effort when things are difficult."
School didn't teach you those things, even if you incidentally learned those while being schooled. The schooling was utterly unnecessary for you to learn.
I wouldn't even try to force you to give up anything. You like it, you keep it, and join with the others who feel as you do to pay for it. Just stop demanding everyone else finance your wishes at gunpoint. There's nothing I want bad enough to rob you to pay for it. Nothing.