I would say Jill picnic (a birthday surprise, It happens if you have friends) Vs sage sickness (she wasn't dying but for some reason you guys act like she was) was mistake on Dpc part. Honestly, Dpc should have let us date Jill if we helped her more once. (Like the recital). As someone said if fuckface is a chick and helped sage while doing everything to grind Jill points. She will still reject which doesn't make much sense when she knows fuckface is a good guy.
after Tybalt's blackmail DPC was in a hurry to dig her grave.
because you can chat all you want, but she shows up at his house out of the blue to wish him well and invite him to a surprise picnic whose ultimate motivation is to inform him that she won't have to see him for a while , without knowing how long, because Tybalt is too trustworthy to have lied.
and if MC explains to her that he has already made a commitment she is mortally offended, so much so that she cannot resist grumbling and questioning his motives, dead end.
then for goodness sake she is so very, very grateful to him for saving her from a resounding embarrassment at the recital she has been preparing for all her life, MC prepared in a couple of months without ever having taken music lessons (believable that the Royces have fallen from grace if money is squandered as it is on Jill's lessons), but no, she doesn't trust him, in case she dumps him just a hair better than she just did Tybalt, who fortunately is in a state of confusion and doesn't know anything, otherwise he would have mocked MC for years to come.
and after so much resolution you know what she does? she shows up at the Halloween party dressed as a sexy bee
Tybalt deserves a second chance, he would have gone to the picnic
Summary: DPC killed Jill without even setting her on fire.