While it’s possible that there’s some of that attitude in Catalonia, I’d point out that the other large, recent European independence movement in Scotland was emphatically not that. Brexit, comparable on some levels, is also different.
In reality, the reasons for independence/sescession movements gaining strength is complex and varies from place to place. That description seems a little reductive.
Catalonia is literally the same, with just more political madness to it.
The reason behind all of this is that we are living in a harsh economic era, politics failed in providing a guidance and unity (since a while) and people don't feel empathy towards other side of their countries and blame them for their country defects, as if you could just point the finger to a specific region or group of people to blame them for the economic tragedies and corruption of modern politics.