It's also a little weird to cry over a show about space wizards, yet here we are
I won't be a hypocrite here, because I think EVERYONE has something that they're passionate about that is, ultimately, just entertainment or performance. People get emotionally invested in stories - even (or especially) works of fiction. Some of the most influential works in human history were works of fiction - from 1984 to Fahrenheit 451 to The Jungle, etc. We've had comics for centuries and theater performances that have moved and astonished the public. Movies that resonate with people are worth talking about... but it's the negative reactions that are also worth discussing. People get invested in sports and going wild when their team plays, etc.
I just have to remember to try stick to the "constructive criticism" or general discourse of a work and refrain from falling into a pointless diatribe or personal attacks. There are certain works I'm not exactly fond of. I legitimately am not that fond of The Last Jedi, but it doesn't bother me that it exists. I respect what it attempted to do, while disagreeing with the execution and final result. There are things I legitimately HATE - from Metroid: Other M to Spider-Man: One More Day - but even then I try and refrain from holding one single individual responsible nor do I wish to seek out those involved and shame them or harass them.
Because so much of these things are collaborative works. Small armies bring these things to life, and it's a miracle anytime anything actually gets made. I remember reading about a studio executive who would always applaud at the end of a film - even bad ones - because he knew how hard it was to get it made; from concept pitches to script drafts to budgeting to casting to scene scouting to scheduling to filming to editing to score composing, etc. He believed that even the worst film had redeeming elements in them.
This is a long-winded way of saying we all have our "shows about space wizards" blind spots. I'm passionate about fantastical stuff - from comics to games to movies to cartoons.
It's not immature to like these things. It's not immature to be upset with these things. It's not immature to cry about these things.
It's only immature to take that disappointment and not digest it in a healthy way, and to instead lash out at those that made it in ways that aren't constructive and are solely fueled by spite and hate.
