Grade inflation only exists in some majors. I know plenty of kids at Harvard doing CS who are definitely not experiencing any kind of grade inflation.
OP, beg your parents. Kiss butt. Cite anything and everything showing that a 2.9 for your major isn’t that bad [if it isn’t]. It’s only .1 away from a 3.0. Beg to put together a plan and promise to pull it up to a 3.0-3.1 or something. Begging is really your only option here; Ivies aren’t going to give you more money just because your parents are capable of paying, but refuse to. Private loan companies won’t offer large loans to a young person without a cosigner. Federal loans are hard-capped. Beg beg beg.
@finaidanon1799 What do your parents expect now? That you withdraw from college and get a job? Are they allowing you to live at home? Do they expect you to be completely independent?
@BuckeyeMWDSG suggestion of speaking with other relatives should remain on the table. You’ve already been given advice to speak to your dad and beg.
There is not really enough information for anyone to make good relevant suggestions.
a. Was this a surprise to the OP, or was this possibility known to the OP for some time?
b. Was this due to the OP not meeting parental expectations (e.g. GPA, selection of major, or non-academic expectations), or some other reason (parents got into financial trouble or just decided for some unrelated-to-OP reason no longer to fund the OP’s college)?
c. What do the parents expect the OP to do now after withdrawing from the current college?
Are your parents divorced? If not, why does it matter that your dad earns more than your mom? Maybe she didn’t convince your dad to quit paying. It might be that he came up with that idea on his own and only partly because of your grades.
Whatever’s going on you’re not going to be able to get around by taking out a $90k loan. You may want to start an adult conversation with both of your parents to find out what you can do to finish your education.
You have several options for finishing school, each of which you should discuss with the Ivy’s financial aid office.
Make up with your Mom and Dad
Take a leave and wait until you are 24 to finish college
Getting married makes you independent on the FAFSA. See if getting married will cause your school will adjust your financial aid.
If your school is one of the ivys that has an extension school like Harvard, get a job, and go to college at night for a much reduced cost. You already have the record of being admitted to an Ivy. I don’t think it would be unreasonable for you to finish at the extension school for a lot less money. You can probably afford to borrow for this. The degree won’t be the same, but it’s not bad and you can keep your social life.
Op is at an Ivy. Waiting for 24 is not an option. Most of the ibis and 100% demonstrated need schools have policies in place that if you start as a dependent student, you finish as a dependent student even if you have a life event that makes you independent (barring the death of both of your parents)
When Op turns 24 s/he will be independent for federal aid, not institutional aid.