Scrooge was already cranky at the end of the Fezziwig conversation, regressing a little in the progress of his transformation and getting defensive about how he's a good business man. The Spirit loses patience with him about that and sums up the rest of what she was planning to show him: "I've yet to show you the black years of your life: your gradual enslavement to greed, your ruthlessness, your ingratitude, your wretched thirst for gold!"
Scrooge protests through all of this and shouts for her to leave him. He's been confronted - and I think convinced - that he needs to change, but this is a big step backward. The Ghost of Christmas Present in this version is going to have more work to do than his counterparts in other adaptations where Scrooge made more progress in the Past.
This Spirit of Christmas Past hasn't carried an extinguisher cap, but Scrooge is so angry and desperate that he grabs her skirt and throws it over her head. It's super awkward, but thankfully the camera stays on Scrooge and we don't actually see the Ghost as she's assaulted. Scrooge simply yells that he can't stand any more as the scene dissolves from his clutching the Ghost's clothing to him in his bed trying to strangle his own bedsheets.