This is where Ariel did "all right" by having the "common sense" to accept Ursula's ultimatum on herself, and not to seek a spell that would change her father's opinions on humans.

If you decide to place a spell on yourself, that's up to you. Technically, that's still more noble than placing a spell/curse on someone else just because you aren't getting what you want from them.

This is a reckless act, and I agree with Starfox.

i understand her anger and desperation, but like...no????

Nope, I could never do that to my mother, regardless of how much she annoyed me/how much we disagreed.

Kinda want to hear explanations from the people who said yes

For all the nasty things my parents both have said or done to me, no, I'd still never do that, not having any clue what it would to do them (or me for that matter).