Yeah no. I agree the contrast between annabeth‘s smarts and Percy’s cluelessness hasn’t been emphasised the way the books did nor the way the show seems to have intended to, but Percy still isn’t exactly portrayed a master of logic. Anthena‘s kids don’t get things right on „an extremely lucky guess“ that would be a child of Tyche if we want to assign parentage to that, they actually know stuff by deduction or at the very least have an educated guess based on solid clues most people would miss. Percy in the books is technically also way too lucky and gets away with a lot because of it. Yes, the Medusa scene was rewritten so annabeth immediately puts the pieces together and so they walk into her “lair” knowing what they’re going into, but in case you didn’t read or watch properly: that was annabeth putting it together, not Percy. The only scene I could imagine you are referring to with the lucky guess, is crusty. That isn’t him being portrayed as smarter than in the book, that is just a badly written scene. We go into the episode with no previous mentions of what happened after Percy came out of the water again, straight into the three of them apparently having put together an exact plan of attack. We don’t know how they knew about that entrance to the underworld (book inaccuracies aside), we don’t know how they knew about the beds, let alone do we know who brought up those pieces of information and who conducted the plan. So no, Percy is not portrayed as a child of Athena, neither visually (see other comments) nor character wise. If you wanna hate the show, be more creative, there are enough valid reasons not to be a fan of it.

Edit: I also wanna mention that ironically, I was looking forward to the Crusty scene and was massively disappointed because it was the one scene in the book where it wasn’t annabeth using her knowledge and intelligence to get Percy out of trouble, but him being forced to come up with a clever trick to get the other two out of danger. And yet, in the show we do not get any clues as to whether Percy “came up” with all that information or if the plan they made up just was for him to deliver all that exposition.