Truly Real Madrid is the king of Europe all thanks to them management, the team president for always bringing in good coaches and young stars who are always potential world best players in view, they play as a team and they have the winning mentality always in every game they play so I guess they should crown them the King 👑 of European competitions because they definitely won't stop winning trophies with the world class players they have in the team right now.
The Atalanta team came so prepared for the game knowing they they are up against the best team in the world but not stepping up low as a result of the first half result of 0:0 shows how improved the Atalanta team has become after their performance in the Europa League finals last season.
That is literally how they build their squad, all the way from plane they pick for travels to equipment manager to team manager Ancelotti to players. They do like winning la liga and they do that quite frequently as we know it, but their entire existence is UCL and they make sure that every player knows this as well, they put the pressure on the players when it's an UCL game and that's why it matters a lot.
Sure there are other teams that try to win it too, like how City wanted one, and how PSG wants one, these are all important and rich clubs too but they do not have that club culture that Real Madrid has towards UCL, they literally make it known that only thing they care about UCL. So much so that, Real could finish third place in la liga but win UCL and they would be happy with that. This is why Florentino Perez wanted to have a "super league" type of league, because he wanted to win the best teams in the world and not just the Spanish teams.