Take this as a life lesson, and understand that while your view of things changes as you get older, most things generally stay the same.

I'm not even 16, why do I feel ancient

I don't know if this will help you, but I think that's pretty normal. I felt similarly at your age in some ways and in other ways I felt like a baby, depending on how I looked at things. I still feel that way and I'm twice your age! It's weird. Growing up is weird. I feel for you. 💖