AgentRedgrave
Legendary Devil Hunter
We got that one scene in DmC with Phineas.To be honest, I don't think they'll ever explain how Sparda died. I think that's a question they'll leave in the dark since it has no real purpose to add. All that can be said about Sparda is that he was super strong, he made demons angry, he died, and people want the legacy.
And to stay on topic with the thread; do we even know how DmC Dante feels about his father?
We know Vergil possibly has some respect for him, but we don't really understand Dante's opinion on his dad. Did he respect Sparda's decision to put him in a foster home of demons, or was he angry with him through and through?
You can also apply this with DMC Dante; did he forgive his father after DMC3 since it appeared he didn't like him that much?
"I know your father, Sparda, I see him in you"
"Sparda was a demon, I'm nothing like him"
Not much, but it's the closest we really see him expressing any opinion of his father
As for classic Dante, well he did initially reject Sparda as his father after his first fight with Vergil. But as Foxy and I pointed out, his views of family, largely thanks to his interactions with Lady, certainly change
"We are the sons of Sparda, withing each of us flows his blood"
And we never see him show any negative view of Sparda in any other game. Heck in DMC1, he even says he'd defeat Mundus "In the name of my father"