I don't understand

why my dad always so annoyed by my actions.
Somehow it seems like everything I do is against his expectations for me.
Just come home from climbing and I only used computer awhile.
He asks me go bathe and then study.
I'm fucking 18 years old already yet he treats me like a kid that don't know what I want for myself.
I said I going soccer tomorrow morning and he "TSK" damn loud.
It's like he thinks I'm not worried enough for my own future.
But in fact, I am fucking worried.
Okay, maybe I'm not worried for my future.
I'm just worried about my results.
Because I already know what I'm going to do in the future.
THAT IS NOT LINKED WITH MY FUCKING RESULTS.
That's why I don't really give a fuck about A levels.
I'm just living under their expectations.
All my worries that I won't do well for A levels are for them.
I really don't mind living a shitty life in the future.
As long as I'm happy.
But right now, it doesn't seem that I'm happy with life.

Doesn't make sense.