When it comes to how I think the Afton siblings view William, it's funny, because it's a spectrum. Michael fucking hates him, Elizabeth loves him more than anything, and CC is kind of stuck in between that.
The reason for their differences in how the three of them view their father is a direct reflection of how they're treated.
William does not even attempt to hide from Michael the fact that he hates him. He is held to an impossibly high standard, and he receives most of the physical stuff, because I do think William's feelings about Michael are different than CC and Elizabeth. This is why Mike had grown to be so angry, misbehaving, and troublemaking.
CC admires him and enjoys attention and affection if he can get it, but the angry outbursts if he does something created some fear and anxiety. I think this is the reason he is so jumpy and easily startled by loud noises. He'd been growing more uncomfortable and indifferent as he got older because he's more attentive than Elizabeth, particularly when it comes to Mike. Mike can lie and avoid/change the subject all he wants, and he can enact damage control in an attempt to create as much normalcy and ignorance for his siblings as possible, but the emotional affect it has on him is visible to CC through the guise.
Elizabeth gets the most positive attention and the least negative behavior from him. But make no mistake, she may be less neglected than her brothers, but is still neglected nonetheless. It's bare minimum really. She can't see it that way being so young and naive, but she thinks he's there for her more than he actually is. This creates an increased longing for his attention, and extreme loyalty to him. This also makes her extremely desperate for attention from other people in her life. In other words she had early abandonment issues. She was the type to freak out if a friend of hers decided to play with someone else on the playground for a single day. Anything negative she gets from him she views as negligible. Or if she's upset, it's quite easy to console her with an apology, framing it as necessary, or an I love/care about you similar to what we see with Vanessa in the movie.