Earlier quoted context omitted.
Well, well, well, well... You should read the constitution and compare it to what the catalonian establishment is doing. The rule of law applies also to politicians.
If the law goes against one of the principles of democracy, the issue is with the law. What would your opinion be on a constitution that allows slavery? Because that was the case with a lot of constitutions in the past, and I think we would all agree that from a human right's point of view it was wrong. What's going on in Catalonia is illegal, but it's the democratically correct choice, and given what the Spanish gov…
The right of a part of a country to secede is not recognized by most constitutions around the world, and it is certainly not a "principle of democracy".
You want to change the constitution that rules your country, you get 2/3 of the votes of the parliament behind your vote and the constitution changes (or whatever rule your constitution has to allow a change). The whole point of a constitution is to have a stable body of law.
The Estatut went further than giving you something similar to what the Basque country has. It was ruled out because it was deemed incompatible with the constitution. This is exactly the same process any other country with a constitution follows.
As for the "rights" that you are not enjoying, the only one I hear repeatedly is one: collect and distribute your own taxes, because you pay more taxes than what is reinvested in Catalonia (of course this happens in roughly half of the country).
If New York asked to secede from the United States because they were oh so tired of paying more in taxes than the average in the US and receiving less than what they bring to the table (which is true for the vast majority of "rich" states) we will all see through the bullshit of the argument.
If you want to follow that argument, when do you stop? is it right for my city to secede because we do not want to support the poor in rural areas around us? (this is not a retorical question, some big cities have historically done that, and many of them today are tax havens). Can I as an individual decide to not pay my taxes because I pay more than what I receive?
Exactly what other right is missing in Catalonia?