Welcome to Mind the Gap. Tax is weird. Most people agree we need some level of it, so I’m gonna make this as easy as I can, so you don’t waste time, money and brainpower.
The first thing, as you probably know: taxes pay for all that cool stuff we take for granted (roads, hospitals, schools, police, fireman, ambulance emergency services, national defence, public infrastructure like libraries and parks and beaches, and all that stuff).
Tax is where people give their money to the government.