I disagree on quite a few points with this entire essay, but im feeling lazy so rip pointing those out.
id say there isnt a thing like 'the pokemon anime series' anymore. I can say that there was a pokemon anime series from the original series up until sinnoh league victors, but starting with best wishes the continuity dropped. the reason I say this is because from the og series up until sinnoh league victors, ash actually grew. he started out as a rookie trainer in the original series, started maturing and developing somewhat during the johto arc, became slightly more serious and strategy-focused in hoenn, and as soon as the battle frontier hit, you could just see that ash had become an actual veteran skilled pokemon trainer. that trend continued through sinnoh.
then unova happened, with the first 'reset' as you can call it. ash was dumbed down, pikachus strength got the biggest blow it had ever received (thanks snivy), and whatnot. this incarnation of ash could best be compared with how ash was in johto. kalos happened, and we jumped back to smart ash. not as smart as sinnoh ash by a longshot, but could be compared to hoenn ash. and then alola and we are straight back to kanto ash.
to me, this felt like it wasnt a real series anymore. rather, for every new region that was to be visited, a new series got created. from unova onwards, it didnt particularly expand on ashs story anymore- every region past sinnoh had their own ash, and every one of those ashs had their own story for that very specific region. new region? clean slate, new ash. I dont particularly like this treatment of the protagonist, and honestly think they should just pull a yugioh on this one and start over with a new one.
thats not to say I dont understand their decision of 'resetting' the protagonist every region. yeah, it appeals to us older viewers, but id imagine young and new fans would be rather disturbed if constant throwbacks are featured to older series that they never watched.