I agree, eventually it can come down to rule changes if infractions and the rule itself becomes absurd to some degree, so it's nothing that they are often unhappy with the decisions. I don't understand the aggression of many towards them, it would be one thing if they complained and lost, but no, they win and say the officiating is sometimes bad. It's not the same thing
Both Real Madrid and Barcelona have been beneficiaries of wrong refereeing decisions most especially against lower clubs. It is now that it is not going there way that they are eager to actually complained. Last season under Xavi Hernandez Barcelona complained bitterly of bad refereeing and Madrid didn’t because it didn’t affect them then. Now it is vice versa, yes overall the refereeing decisions most especially since the inception of the VAR has gotten worse and the lower clubs who don’t stand the ground can’t not complain about it. So seeing Madrid complaining about it is definitely a good thing but they shouldn’t be doing it selfishly because of them alone but everyone.
I don’t think Madrid will leave the league just like that because it’d be a big betrayal to the entire Spanish nation and been a club in the capital means they can’t simply leave because it will most probably end the League dominance. Moreover almost every league has this problem too so they should simply work out theirs and not go elsewhere