Somehow everybody seems to expect miracles from Piastri. Even Horner is talking about him, although I think that Checo has done a more than decent job there and even the slightest thought on replacing him would be unfair (and probably a mistake).
McLaren cars were problematic this year. Actually all Mercedes cars had a weak start of the year. Even Norris did bad. Ricci just couldn't adapt to the car, I don't know, but he was not the main problem there.
Luckily the Mercs seem to recover good and there's a good chance next year will be better. But if McLaren or Mercedes make another mistake in the setup and the next year will be bad again, even Piastri won't be able to make miracles.
Don't misunderstand me, I would love to see real competition. But it's, by far, not only about the drivers there.