I think that one thing people fail to understand is that unsolicited literary criticism coming from an online stranger who is reading with no knowledge of what the authors intended goal is, is not going to be received the same as say: the authors beta reader or friends who know what the authors intended goal and has the sufficient knowledge and input to help the author reach that desired outcome.
"But I'm only trying to be helpful" How do I know you have the knowledge and literary skill for you to be able to actaully do that when we don't know each other and you are essentially a stranger to me? Are you applying this criticism based out of personal biased experience and desire to see the story or characterization be driven in another direction or tweaked, or do you know the author's intentions for the character? If the story is incomplete, are you basing your criticism of a character on the incomplete narration with only partial information available of them or are you building up a report until the story's completion? Did the author provide you with the information needed to make a fully informed criticism?
Have you discussed with the author what their plans are or are you assuming them based off the narration, especially if the narration is proven or implied to be unreliable or missing key points of the plot? Are you unbiased enough to help them reach their desired outcome for the characters and story regardless of your personal feelings towards the characters/antagonists and setting? Can you handle being told your specific input isn't wanted because you're a reader and/or have no written anything relating to their genre or topic? Do you understand and respect that the author's personal experiences might influence their writing and make it different than how you would have done it personally? Do you understand if an author only wants input from a specific demographic relating to their story?
If it's for fanfiction or other hobby media, are you holding a free hobby to a professional standard? Are you trying to give criticism because you feel like the author has produced 'subpar job performance' of their fic? Are you viewing their work as a personal intimate outlet or something that must conform with mass media? Are you applying rules and guidelines when the fic is shared for simple sharing sake? Is your criticism worded appropriately and focused on the parts where the author has requested input on rather than a general dismissal and or disapproval?
Have you put yourself in a place where you assumed you have the input needed for the story to evolve better, or have you asked what the author needs and what they're having trouble with? Can you handle having your criticism rejected if the author decides their story doesn't need the change and not take it as a personal offense against your character? Are you crossing that boundary because you think you are doing the author a favor? Are you trying to be helpful, or do you just want to be?
I think sometimes when people hear authors go 'please don't give me unsolicited writing advice or criticism' they automatically chalk it up to 'this author doesn't want ANY constructive feedback on their stuff at all' and not "i already have trusted individuals who will help me with my writing goals and- hey i don't know you like that, please stop acting so overly familiar with me'
Danny is dating one of the Bats/Birds, and everything is going great, amazing even! They know each other secrets (from powers to everything etc), they have a wonderful place to live (even if its in Gotham), Danny is in college on the way to becoming a space engineer (and he does side jobs for unrestful ghosts), he's actually getting sleep again since leaving Amity Park, gets along with their friends and family (those who Danny or his partner still talk to, up to the writer), there is even talk about marriage and perhaps adoption/kids in the future between Danny and the Bat/Bird he's dating!
Everything is setting up for a good life in his future, something Danny didn't think could have after his accident. He was happy finally, and currently packing up his old apartment because he's moving in with his partner in a few days.
So he felt like his core was being pulled out of him when he opens his apartment door one day receiving a knock to find his parents, who had hadn't seen since they kicked him out of the house after coming clean about being Phantom (their words of anger and denial that their son was 'dead' and now a monster, still hurt)
Sure they didn't attack him or proclaim he's dead but still their last words and anger HURT.
Danny didn't give them a chance to open their mouths, both looking nervous and guilty, before he slams the door close and turns invisible, grabs his phone, and fly's out of his apartment to his partner's place in a panic attack.