Real Madrid and Barcelona have been in a rivalry for many years. As you said, even if there were years when Atletico Madrid was included in the race, we were usually watching a championship race between the two. I must say that the times I enjoyed the most for myself were the times between Messi and Ronaldo. I think this season will be enjoyable as well, apart from the previous seasons.
The competition in La Liga is always dominated by these two classic teams, even though Atletico Madrid broke the championship tie, which was always won by the two teams, but it only happened for one season and did not happen in a row. In fact, if only two teams always dominate, of course the quality of the league will decline and become boring, but what is unique is that Real Madrid and Barcelona can always make waves in the transfer market so that the popularity of the league continues to increase. Yes, maybe in my era the rivalry between Ronaldo and Messi was always an interesting thing to enjoy, maybe in the previous era there were also antagonist actors who made the La Liga stage quite entertaining. This season we will also see talented young players like Bellingham who is quite phenomenal with Real Madrid.