the thing about Damian, especially pre-Robin, is that you have to straddle a line between child and cult assassin. He’s a nuanced character, you can’t dumb him down or simplify him. (On that note: PLEASE stop calling him feral! It’s racist as fuck!)
You cannot make other characters be nice and understanding to him from the start like Dick or Tim or Jason. You cannot make them treat him like a toddler below his actual age.
You also cannot make him a irredeemable psychopath who exists only to hurt Tim and sow conflict. Because that’s just straight up not true. Fanon.
Writing Damian needs to be a balance between these, and he needs this nuance to be interesting.
If everyone treats him softly, then there’s no point for Damian’s personality as it is. He is rude and arrogant and abrasive for a reason. You could argue that he’s spoiled, but he’s also a child who was ripped from a culture he knew and thrust into the arms of a white family who don’t understand him and don’t make the effort to actually teach him their views. He’s rude and angry because there is no place for him there, not until Robin, and even then he is still subject to their judgements. If everyone treats him with kid gloves, then his attitude comes without justification and doesn’t make sense.
Please remember that when Damian first appeared in comics, everyone except Talia disliked him. Bruce wasn’t sure what to do with him, but he also was quick to scream obedience. From Dick’s inner monologue in Resurrection of Ras al Ghul and his very early interactions in Batman and Robin, he didn’t like the kid and thought him a burden to bear in the place of Bruce. Tim never once gave him mercy after the first meeting. His inner monologue and actions all speak of hate and teenage angst - some justified, some way out of line.
Damian’s anger is then reasonably apparent. He doesn’t fit in. He can’t. But he doesn’t seek violence. He doesn’t try to murder everyone in their sleep like some people think. It’s shocking that fanon’s interpretation of him is a boy who goes for the throat in every interaction. He’s snippy, but in every single comic I’ve read he’s never tried to fight someone without a justification. If he was an X-Men level telepath, then I’d argue that his actions would become worse if he really knew what people thought of him at first glance.
If you’re a child that knows he is hated, then you lash out. You test boundaries. You see what will make them exile you, hurt you. You are a brown boy surrounded by a white city in a culture that you don’t understand. You cannot see your mother again. They hate her. You cannot express yourself in a world that expects the worst. You are shackled by expectation and judgement. They won’t let you be, but they won’t let you go.
You are stuck.
And in this, you will always be.