I think for most people, football is about in-the-moment experiences. The best versions of those leave lasting memories and winning cups is naturally right up there. Seeing iconic players have iconic moments falls into a similar category. This binary choice between "it's all about winning things" and "it's all about experiences" is a false dichotomy for that reason, and the implication that people focusing on Ronaldo's performances are simply looking at it from trophies in a cabinet or points on the board perspective is similarly false.
For me, Ronaldo's 2nd debut will be a standout memory, the buzz was brilliant. But for a lot of people, that memory will have a bitter taste because of most things that have come afterwards.
He hasn't lived up to the hype built up on that day, he's been central to a lot of very painful in-the-moment experiences thereafter, and right now as is, when you're watching Ronaldo on the pitch you can't just enjoy the moment in the absence of everything else, fundamentally you're watching the game now with the hope of watching great football, watching him put on great displays, and watching us win games. That's a normal mindset to take into a game. And quite regularly we're failing to see all three, so it's entirely reasonable that people can't just enjoy seeing Ronaldo in that shirt, because ignoring all the rest of it would mean ignoring all of the typical things about supporting a club, rather than a player.