Failed Parenting

My son is taking gymnastics lessons, but he is not improving much.
I believe the basics of improvement are to 'watch, listen, and try,' but he is distracted by other things and cannot 'watch' or 'listen.'
Even when I ask him how he thinks he can do it, he just answers, 'I'll try my best.'
Because of my job, I had a little confidence in teaching, but since he wouldn't watch or listen, I ended up getting furious.
Yesterday, after two years of this, he said something to me for the first time.
'I don't want to practice with Dad.'
To that, I replied quietly,
'I'm relieved, because I don't want to do it anymore either.'

In the first place, I was frustrated that he had to practice at home even though he was already taking gymnastics classes. He has no motivation anyway.
Whenever we started practicing at home, he wouldn't pay attention, so it would end with me getting angry almost every time.

I hate that I am doing this with such feelings, and I hate that my son has to practice.

I think the toddler stage is about learning through play. It is my problem that I couldn't adapt to that.
It is a question of how I should adapt, but since what we are doing is a sport, I cannot forgive him for laughing off his mistakes.
I am not suited to teaching my son, so I have decided not to get involved in his gymnastics anymore.
Today is his gymnastics class, and I hope he practices hard.

I don't know what good it will do to leave a diary entry like this, but I want to write it down.

I'm looking forward to a good day today, too.