It depends on which scene. If you're talking about the one early in S2 where Hades shares what happened to him with Persephone, that one's kind of a combination of lovebombing and trauma dumping + trauma bonding. And the reason I say that is because he basically takes away Persephone's moment to be vulnerable and talk about her own trauma and turns it into something about himself. Which he does a LOT in LO.
Like, this all happens after she's JUST revealed her side of the Act of Wrath and the events that led up to it (particularly involving her childhood) and Hades segues it into talking about himself.
Of course, that's after he shows her the tape of HER memories that he got without HER consent.
But of course Persephone's fine with it because she's not allowed to realize that her future husband might be a creep.
Anyways, it does seem like Hades is trying to "repay" Persephone for telling him her backstory, but that just doesn't work all that well here because it just comes across as insensitive. She's barely had any of her own time to reflect on the events that occurred VERY recently (though the timeline is unclear, know that Persephone was 19 when she moved to Olympus and the Act of Wrath had to have happened shortly before because she was clearly a young adult) and now she has to sit through listening to his baggage from 2000 years ago.
Like, this man has had two thousand years to talk to someone about this. But of course, it's the pink cinnamon roll girl that he met at a party and has known for TWO WEEKS who gets him monologuing about himself and trauma dumping.
And it's trying so hard to be painted as romantic, but really, it's just another case of Hades love-bombing Persephone.
This kind of dialogue is used in romance novels a lot but when you actually condense the timeline and understand that this 40+ year old man has only known this 19/20 year old girl for two weeks, it comes across as less romantic and more like he's just manipulating her. This is a VERY common tactic used by abusers and groomers (*note: this is a blanket statement that does not apply to all relationships) where they'll make the victim believe that they're just that special, that important to them, that they would tell them things they've "never told anyone before." Maybe this would happen in a relationship between two people that's been going on for a while, but someone you've only known for two weeks and you're still trying to get with? It's a bit more of a red flag there.
Meanwhile I'm staring at LO like, you're trying to convince me this man has never talked about his trauma ONCE? Not even with Hera, who he HASN'T EVEN TOLD PERSEPHONE HE'S BEEN IN A LONG-TERM AFFAIR WITH? Never mind the fact that he wasn't the only one who went through what he did, you're telling me he's never talked about it to anyone, in 2000 years? That's a load of baloney. The man needs a therapist, not a girlfriend.
And this isn't the only time Hades uses his trauma as a way to either trauma bond with Persephone OR to make excuses for his own actions. I can think of no better example than when Persephone finds out about his affair with Hera.
He makes the topic about Hera and her trauma. She does not know Hades is talking about this. She hasn't given him consent to tell Persephone about this. Hades is saying ALL this to get to the final point of: "I was in an affair with Hera because Hera and I were both traumatized and Zeus just couldn't understand that." (never mind the fact that Hades is also dismissing everything Zeus went through here just because Zeus doesn't have physical scars like Hera and Hades do, which is... ick.)
And then he goes off even MORE about his experience being sentenced down to the Underworld and eating the pomegranate and yadda yadda yadda the man literally will not shut up. Persephone at this point has opened up to him about her trauma once across the course of like, two episodes (and he doesn't even know about the SA yet!) and meanwhile Hades gets MULTIPLE episodes to talk about how sad and lonely he's been his whole life.
(he also thinks therapy is pointless because of course he does:)
He doesn't take any real accountability here for his actions. He doesn't take accountability for lying to Persephone about his affair with Hera. He doesn't take accountability for lying to Zeus - her husband and his BROTHER - about the affair for centuries, and he still doesn't know. And this is one of the first signs (chronologically) that Hades makes it a habit to form his relationships off trauma bonding and love-bombing.
(I'm so sad for Minthe here now in hindsight because she's literally telling Persephone that Hades is a chronic love-bomber but then she never connects that she should stop fighting with Persephone over Hades because of this. Like in any other comic, Minthe would be warning Persephone, not trying to get Persephone out of the picture so she can get Hades back.)
So yes, I would say Hades is absolutely trauma-dumping when you take into account the fact that he seems to be using it as a form of love-bombing and trauma bonding, and the fact that the comic spends way more time justifying his horrible actions through his trauma, while Persephone's trauma which is an ACTIVE PLOT POINT in her character arc and the comic, gets shoved off to the wayside so it can take a backseat to Hades' 2000 year old baggage. Screw what the women are going through, the man's talking.
That said, don't get me wrong, Persephone's still a horrible person who uses her trauma as an excuse for her actions too, but that's for another post.
In the meantime, have this great video about love bombing: