It's a good question. Most teams have no money or power, and right now our president is only worried about the elections. rm and florentino also have a lot of power and influence, not only with lfp, but also fifa. And most of the spanish media is pro-rm. All this corruption will take a while to be erradicated.
I still think that it is a political question, and nothing can be done.
Again, I am from Croatia, and until 1991' Croatia was a part of former Yugoslavia with Slovenia, Bosnia, Serbia, Montenegro and Macedonia.
When in 1990 Croatia started indenpendence talks, referees in Yugoslavia football league were in favor of pro-Serbian clubs.
Because Croatia wanted to get away from Yugoslavia, and Serbia wanted to stay. (Serbia was Yugoslavia, more or less)
So, Croatia and clubs from Croatia were something like "bad guys" because we didn't want to stay in Yugoslavia anymore.
So, referees were against Dinamo Zagreb, for example.
Also, teams who shared similar political views as Serbian clubs, were playing "hard" against Croatian clubs, and they played "soft" against Serbian clubs.
Imo, Catalonia and Spain share the same story.
Catalonia wants independence and they are "bad guys", let's say it that way (in the eyes of Spanish citizens). Again, I am not saying that Catalans are ACTUALLY bad guys (since my country, Croatia, did the same thing), but in the eyes of Spain they are=a bad guys.
This leads to a few things:
1. Spanish federation will always be on the side of Madrid (as a pro-Spanish team), and against Barca (independence team)
= that is happening, isn't it?
2. referees will act the same
= that is happening, isn't it?
-- all these penalties for Madrid since always
-- and letting a rough play against Barca's players
3. but also, imo, a part of La liga teams will play "harder" against Barca and "softer" against Real
-- do you have that feeling sometimes?
Imo, that happened 100s of times in other countries who wanted the independence.
So, it is probably hard to understand for someone whose country don't have similar political problems.
In the end, Barca needs to be 10-20% better on the field than Real Madrid to actually win a championship.