I'm of the mindset that you never lose when the other person resorts to calling you names. If somebody's called out for their bullshit, then they've lost.
But it is how they work. Each person is able to choose their own idols. Disagreement is expected. You have aesthetic extremists who will tell you T. S. Eliot is a terrible poet, or that E. E. Cummings is modernist garbage. I personally think that Dickinson is overrated; I know a literary enthusiast who doesn't really think Shakespeare is particularly brilliant. That's all acceptable.
The idea of the liberal arts is that they're not rankable collectively. While there's an objective bad to be found, good is to some degree subjective, and each person can decide what they value. So you're allowed to value deconstructionism if you'd like, or state that meaninglessness is the point of art, and I'm allowed to disagree with you and call your work bullshit.
Where did politics come in? Are you legitimately trying to make a point, or are you just trying to blindly spew your dislike of the liberal arts? If so, tell me so I can directly address that instead of making tangential arguments.