Several instances of that, most notably The Deadly Assassin and The Ribos Operation (also any other time Romana ragged on The Doctor's intelligence).
But at the same time, the classic series also suggested The Doctor was more than just an ordinary Time Lord, most notably the McCoy run.
Honestly, I feel like some people take the Timeless Child thing a little too personally. Maybe its execution wasn't the best (certainly a lot better than the Hybrid crap that I agree was awful and unnecessary and went nowhere), but I am curious to see where Chibnall goes with it.