If Atletico wins the final, they should be considered current no.2 in Spain. Looking at the last 10 years Barca is clearly no.1 in their country and also Europe but Atletico has won as much as Real + EL in recent times.
Yeah,no. Real Madrid made 6 semi-finals in a row(more than anybody) and in the last 3 years this is the 2nd time in the final. If RM wins it'll be 2 CL's in 3years while being in the semi-finals for 6 years in a row. Who cares about EL? Winning the EL as a world-class side is not an achievement.
In the last 4 years (I'm taking 4 since Atletico wasn't a top-side before that) Atletico got first in La liga once and third 3 times.
And why are you using 10 years? Ok let's use last 10 seasons.
RM-First place: 3 Second place : 6 Third place : 1
Atletico- First place: 1 Second place : 0 Third place : 3 .
So RM fares better in the last 10 years in La Liga (your argument) and in the last 4 years even tho those are ATM's most successive years in the 21st century. Not to mention the UCL.