Aww, did someone learn a new word? Unfortunately it seems your education was a little deficient as you apparently don't know what it means.
A comment/opinion of someone's argument is not a direct rebuttal.
Texashiker: "Here we see a dog being starved to death. This is Obama's fault, therefore Obama is bad."
Everyone: "You're a fucking moron and a worthless individual."
This is not argumentum ad hominem. It's not being used as disproof, it simply follows from what you have presented.
What you have presented is basically the panel on the right:
... but with "college tuition costs" inserted. You have followed that with, "Obama is liberal, therefore this is the liberals' fault." Pretty sad that you've been programmed into blaming Obama so much that you don't even know what liberalism and conservatism are anymore.
Have primary school costs risen in line with college tuition costs? No. So socialized schooling isn't seeing this problem. It's your beloved conservative free market that's allowing colleges to charge whatever the market will bear.
You're complaining that the system is too conservative and you don't even know it.