I started playing piano at probably around 7-8.
At first it seemed "easy" when I started learning the scales and pieces cause I just somehow got into the rhythm.
It sort of motivated me to practice lol (not too much but like 30-40 minutes a day)
Wouldn't say I hate it, but when I started AMEB grades I did great. so great that my music teacher encourage me to skip to 4th grade (it didn't make sense to me lol so I was surprised)
From 4th grade onwards, I started to lack motivation, and I barely practiced cause Classical started to bore me.
I somehow endured my way to 8th grade over the years (I think I was 14-15 years old) without much practice (did like 20-30 minutes a day, like 3-4 days a week)
and yeah I did pretty bad lol (though I still managed to pass)
After that I stopped playing AMEB, then I just went on to playing some pop and anime music cause they were fun
I probably spent more time playing those than my whole classical career now.