Grissom put a lemon on the capsule—that tells you what he thought of the Apollo program.
He was still making sarcastic comments moments before the Apollo 1 fire—complaining about communications failure between the capsule on the ground and mission control.
NASA thought he needed an “attitude adjustment” and the rest of the astronauts needed to learn what happened to folks who were not “team players”.
Then NASA got to investigate themselves and declared themselves innocent of all wrongdoing.
If you dig a little bit you can learn that Grissom’s wife believed he was murdered.
I recently read “Apollo 8” which goes into a lot of the background of the Apollo program, including the story about lemon (but not what the wife thought). Massive dysfunction in the production, the communications problems as you mentioned, on and on.