Tbh, you're only the best team when you win BOTH the league and the CL. Many times when Real won it, they didn't win La Liga. Therefore, I don't consider them to be the best that year. CL is a cup competition, so luck plays a much bigger part than in the league. I think Barca won the league every time they also won the CL.
Imo, the CL has become too important in the Ballon D'or for example. In 2016, Messi was, on an individual level, clearly superior to Ronaldo. Cristiano won the CL and Euro though (any other year Portugal would be out after placing 3rd in the group stage), so that sealed the Ballon D'or for him. Both Messi and Ronaldo made it to the final of respectively the Copa and Euro, but due to the fact that Ronaldo didn't play more than a minute, the final cannot be counted in a comparison between them.
People saying often how CL is a lot about luck and short term form in spring.
Which is true.
Those people say that league lasts longer and how league shows a real form.
On the other hand, CL is a competition for big boys with a sudden death rules and you need an enormous experience and mental strength.
For example: when Barca faces Atletico in a CL, we have only 180 minutes. And we will be either dead or alive.
There is no room for mistakes.
If you lose, you are out.
In La Liga, you can lose to RM or Atletico, and who cares?
Next week you'll win against Getafe or Levante, and if RM loses against Las Palmas, we are back to square one.
So, there is not that much pressure in La liga and there is no sudden death.
So, imo, to some extent, teams filled with bottlers may be able to dominate in league tournaments, but will be exposed in CL KO matches.
Also, in La Liga, Barca (or any winner) can theoretically lose twice to Rm and Am and still be a champion due to more wins against smaller teams.
Some people will get offended, but imo, La Liga and other league championships are more about: how to find a way to win as many matches as possible against midtable and bottom table teams.
La liga winner is not a team who wins in El Classicos, but a team who makes less mistakes against Eibar, Getafe and similar.
So, yes, La liga has it's charm. CL also has it's charm.
But imo, let's not play down the importance and difficulties of winning a CL.
CL is the biggest prize in club football and that's it.
RM are masters of it, and imo, they are often playing dirty tricks. They are often able to have mediocre seasons in La liga (and imo losing in CDR on purpose) and yet, you'll find them flying in March, April and May against Bayern, Juve and other big teams.
RM has experience in these KO matches and they have a huge advantage over other European teams.
Also, when they are losing, they are not losing their heads (unlike rookie teams like Psg) since RM have been in 0:1 or 0:2 situations 100s of times and they were able to turn it around.
So, they possess a huge selfbelief, self confidence, mental strength and everything.
Plus, they aren't a bad team at all.
In short, I don't agree with you that winning against Gerafe and Eibar is harder and more important than winning a tricky (and somewhat luck based) CL trophy.
Ok, it is the best when a team wins BOTH CL and La liga in the same season.
But in the end, who wins a CL=wins a biggest prize in that season...