See the spoiler.
My point still stands. Stop taking it so seriously.
And besides even if Ash loses the leagues all the time, he doesn't exactly do too badly either. He came 4th once.
He's 10, all the other trainers who win the Leagues are always adults. Ash is actually shown as being an amazing trainer for his age, its just that the anime doesn't remember the previous series happened 90% of the time because the kids watching them probably didn't watch them.
Honestly, you should be glad they still make throwbacks to the old series at all.