Also, his post seems to be forgetting that the first champion was a complete bag of dicks and we saw him being a complete bag of dicks throughout our entire journeyI rather disagree with this notion though.
As was pointed before, being the Champion just means you're the strongest. That doesn't play to who you ARE at all. To make the Champion memorable, they do need a personality beyond that, but the problem is... to me it seems you're trying to fit the Champion into this single, idealized model where they should be helping you out. There are other ways to make the Champion memorable, and I'd be more interested in exploring such ways, as Champions that help you have been done, well, multiple times.
Nothing says the Champion has to be a good person. They kind of did this with Malva (As an E4), with her being part of Team Flare, but it was executed rather badly since this didn't really matter in the slightest.
In theory, you could totally have the villain team leader be the Champion. (Which was again, sort of done with N, who became the Champion, and he WAS the king of Team Plasma. He's not the real leader though) This would also explain why the Champion isn't there helping you out as they should, y'know?
Which I liked