Sorry to add to your post but yeah! It's getting increasingly obvious that fans were expecting a perfect adaptation in the sense of everything happens exactly like in the books within the confines of the new medium, and while that's valid, most of the nitpicks are about changes they purposely made!
Gabe's portrayal, Percy knowing things from the get go, etc. You can dislike them all you want but that doesn't change the fact they're not mistakes, it's the original author's right to mix and match and shake things up because this is a story they're writing with the rest of the series in mind unlike when he first wrote TLT, and he also has a team of Amazing writers and a team that knows how to write a story, maybe better than he did as a new author, because they know the medium better than he does!
Of course the show has issues, but in my humble opinion the changes are not part of that, at least not entirely, more like they struggled to balance the new with the old (i.e I love that the trio knows what they're up against, but they could work on other ways to increase tension) but that's something that comes with the territory and it will get better in the next seasons (🤞🏻), and I believe people should look at the show as his second draft, a reimagined PJO that reflects the current times.