i didn't know or think that just by using a service that allows me to buy things from websites and adding money to said website would require me to tell them everything about me all the way down to the length of my loving asscrack
PayPal made it abundantly clear to me that you needed to be 18 to use it when I made my account. And given it's a money-transfer service that can draw funds straight from bank accounts it was pretty clear that faking your age is not like lying to a webforum to say you're 13.
You're at fault for not looking at their T&C's in anyway beforehand.
Tbh, this basically proves PayPal's point, you're not old enough to be financially responsible.