To be sure, it's not as easy as you say.
Real Madrid has indeed become the king of the Champions League with many titles, but to win the Champions League title you have to try hard to overcome various challenges from teams who expect Real Madrid to fail. It's not easy to beat PSG, it's not easy to beat Bayern Munich and it's never easy to beat Manchester City and Liverpool, but at least Real Madrid managed to beat them to win the title.
Even though the Champions League title is the main priority, Real Madrid should not underestimate its competition in the domestic league. La Liga, Copa Del Rey and Super Cup are prestigious titles in Spain, so they will not ignore any challenges from there.
The team that caught my expectations short last season and I did not expect is Bayern Munich, I’m waiting patiently again because I don’t know what might come out from them during the title race. I knew Bayern Munich are tough but to an extend winning Arsenal is excellent, I predicted Arsenal winning at first leg and second leg mostly when it got to be a home game. I think they have a great potential this time and I’m expecting more since they proved they’re good during their previous champions league race, PSG as always they’re good likewise Real Madrid. The race this time will be reshuffle and we might not see that coming although I can easily predict a team strength by viewing their performance regular.