Earlier quoted context omitted.
Constitution reform is the only way and yet lots of people keep pointing to other things, this is the reason we are stuck in this situation now. That road is long and requires actual politics, what they have done is taking a shortcut to nowhere.
Catalan are not majority of Spain. They cannot themselves change the constitution, yet they do not want to stay in Spain. So it's a fake "way." The majority should not be allowed to bully the minority.
Every region has its own parliament and has representation in the central parliament. If you want something for your region you have to negotiate with others. And most regions have it way more difficult than Catalans to achieve whatever they want.