"I had such low self esteem, I was a mess,
So I gave it all up for the Netherworld,
I’ve been here forever, girl,
If I was more clever, girl,
I would have stuck it out, knowing what life’s about,
Pain, and joy, and suffering,
Failing but recovering,
I’ll tell you another thing,
Everyone here is alone,
So if you are breathing? go home!
If I knew then what I know now,
I would have looked within and let love in somehow,
If I only knew the truth back then,
I wouldn’t have had my little “accident”,
Don’t be blind, you left your whole life behind,
See a shrink, call a priest, ask the recently deceased, death is final and you cannot press rewind,”
“Don’t jump when the light is red,”
“Toasters should be used for bread,”
“Never smoke cigars in bed,”
“Nietzsche was right, y’know? to live is to suffer, bro,”
“Don’t cheat on the one you wed,”
“Never whip a thoroughbred,”
“Angry pigmies shrunk his head,
Why did it take death to see happiness was up to me?
If I knew then what I know now,
I would have laughed, and danced, and lanced every sacred cow,
I thought I knew, but I was wrong,
‘Cause life is short, but death is super long,”
“I exploded!”
https://www.youtube.com/watch?v=Eu4FfhQTWaM

You aren't convincing her to go away Eliza

Eliza knows she could have done the things she did differently and it probably would have turned out better, but she's in it now and there's nothing she can do to change it, she doesn't want Rachael following her and doing some of the unforgivable things she did just because Rachael is upset with her current situation

Eliza is basically the acting overseer of the Nightosphere, Hunson Abadeer leaves her in charge and she actually interacts with most of it's denizens, she is adored throughout the Nightosphere, she's Marceline and Finn's daughter, of course she's adored and she's good at what she does

Rachael wants to be a Rockstar and not a royal, being royal makes things a bit hard because she gets things just for being a princess and not from her own merit, and it makes her mad and resent her parents for of course something they can't control, she tried to run away to the Nightosphere, where no one knows her, and oops, here's an old friend who actually runs this place now and is trying to convince you to go home

Eliza can't just go back home no matter how much her parents want her to come home, she kinda' led a siege on Ooo, she can't go back, she doesn't want that happening to you Rachael

"What I Know Now"-Beetlejuice: The Musical
Eliza and Rachael-Me