i think the main reason they do things like that is to keep the new generation of children coming in. i understand people have watched the seireis from the very first episode and are watching it now thinking... 'WHAT THE F*** ASH!!'
But in all honesty, i just laugh along with it. i mean if they wanted the children from our generation (the children who were alive when the first episode was released) to still be watching it now, i think they would have made ash get older and get better as the series went on... atleast thats what i would do. they make ash keep making the same mistakes to educate the newer veiwers. thats all.