I’m sure the Vatican knew exactly what they were saying when they put that in the document. Everyone is entitled to a Mass that conforms to standards as set for in RS and the GIRM. Priests are not supposed to be taking liberties with the Mass and if Priests are taking major liberties with the Mass then it is up to people to first confront the priest in a charitable manner outside of Mass, then the pastor then the bishop.
As I said before this doesn’t apply to minor things (i.e. you don’t like the individual songs the priest is picking, you don’t like the content of the homilies, there may be 1 to many EMHCs, etc.) but for major things you are in your right to complain to the proper people. Also assumed is that the person is using proper charity and compassion when making those complaints.
Let’s take an energetic parish priest who thinks that the way to get young people into church is to make the service as informal as possible. Now personally I disagree that this is effective. A bit of advice, if it can be phrased tactfully and constructively, might not go amiss. What young men respond to is formality, not some guy with a beard strumming “Abba Father” on a guitar.
Priests are not supposed to be taking liberties with the Mass, outside of changes to optional parts of the Mass. There are other ways to get people interested. It’s funny the most effective priests at my parish have also been the newest and most Orthodox priests in the area.
However the last thing that that parish needs is endless petty complaints to the bishop. The priest deserves support from good and enthusiastic members.
Agreed that a priest doesn’t need petty complaints and priests need support. But if the complaints are about things that aren’t petty, the priests need to be given an opportunity to explain themselves and make it right, and if not then complaints should go up the chain in an appropriate and charitable manner.