The book Digital Apollo [0] is fascinating on this subject. It describes the tensions that had to be resolved in terms who had overall authority, e.g. mission control vs. the crew vs. automation.
Tom Wolfe’s The Right Stuff talked about this too, with the Mercury astronauts being called spam in a can.
In the movie version, there’s a scene where the test pilots are deriding the Mercury astronauts as being no better than monkeys that had been sent up in earlier rockets. Yeager shuts them up by pointing out that a monkey doesn’t know he’s sitting on a bomb.