Re-reading Sense & Sensibility is so funny because there's a moment where Marianne asks, in genuine shock and horror, if Willoughby is selfish, and I cannot stress enough that it is at nearly the end of the book.
At this stage in the narrative Willoughby has done (and explicitly admitted to in the text):
Seducing, impregnating and then abandoning a fourteen year old because he was BORED
Flirting intimately with Marianne with no notion, at first, of marrying her even though he shamelessly raised her hopes; again because he was BORED
Fleeing in terror after he caught feelings, but NOT because he caught feelings, mind, but because his main hope of gaining masses of wealth was a female relative who disapproved of what he had done to Pleasant Diversion Girl #1 and he was mortally terrified of being poor; and while he did love her, Marianne was too poor for his delicate tastes to consider marrying now
Ghosting Marianne entirely to avoid being Embarrassed by his own conduct
Spent his entire time in London semi-stalking them specifically so he could Ghost her Extra Hard Core; so he was essentially yeeting himself out of the nearest window whenever they were in spitting distance because, again, he was Embarrassed and didn't want to be seen as The Bad Guy
Failed his Ghost Protocol so epically that Marianne found out his disappearance had been deliberate in the middle of a public forum and then disclaimed all responsibility for the scene this caused
Signed his name to a letter in which claimed he was at exactly zero fault for getting her hopes up and was deliberately intended to be cruel and break Marianne's heart because while he loves her most tenderly his new fiancée, who wrote it, holds the purse strings and he wants the money so bad he goes along with it, which eventually leaves Marianne so emotionally damaged she becomes deathly ill
While Marianne lay on her near-death bed after weeks of pining and misery, he stumbles into the scene and gives Elinor, the long suffering sensible sister, a long, drunken monologue about how his wife is very mean and he's very sad and hard done by except for being filthy rich, never really apologizes for the letter (he does explain its existence) and only really mentions the fourteen year old he left pregnant and ruined when he victim-blames her or does an impression of the 'I am blind I cannot see' meme or moans and groans about how he's so put-upon and misunderstood. (This is where he explicitly admits he only did what he did to the two girls out of, and I am not making this up, boredom)
And, like, Marianne knows this. This has all been wholly related to her IN FULL from Elinor who had the unfortunate fate to have to listen to all of this while her sister was recovering from near-death the next room over and she hadn't slept for something approaching thirty hours. Like, Marianne has read his figurative rap sheet of sheer self-involvement all the way through, including footnotes.
And she's still like: [shocked pikachu face] Willoughby?? Selfish?!!