Imagine a referee makes the correct call and City's players, and Haaland, reacted the same way. We'd all think they're bang out of order.
The difference between the two situations is how bad a referee's error is, and that's not for a player to decide (especially not while in the field without the benefit of replay and so on). There's no way to say "this error was bad enough for the players to crowd the ref and scream at him, but this one wasn't", so we need rules for how players can react to a call. Even in fucking atrocious refereeing decisions like this one.
Imagine a referee makes the correct call and City's players, and Haaland, reacted the same way. We'd all think they're bang out of order.
The difference between the two situations is how bad a referee's error is, and that's not for a player to decide (especially not while in the field without the benefit of replay and so on). There's no way to say "this error was bad enough for the players to crowd the ref and scream at him, but this one wasn't", so we need rules for how players can react to a call. Even in fucking atrocious refereeing decisions like this one.