Objectively, the woman has almost 300 million total followers, and has driven almost a half million new signups in TWO DAYS with her post clarifying she's not supporting Team Red. Objectively, she has a net worth that pisses off quite a few liberals because we tend to think having billions of dollars is millions of people living in abject poverty. Objectively she is a part of American popular culture. Objectively, she has eleven singles ranked at the top of the Billboard Hot 100 chart. Objectively, she has 232 charted titles on the Hot 100 as of February of this year, ranking her as the most accomplished woman and in the top ten of ALL singers, world-wide. By all objective measures, this woman is a really damn good singer.
Your opinions of her are your own, which is subjective. The numbers I cited above, taken from Billboard are very objective numbers based on how often songs are bought and streamed. While it's very subjective for individual viewers (and I agree, she's not my cup of tea either!), the objective fact is that Swift speaks to a lot of people, and your personal disdain for her doesn't change that fact one stinkin' bit.
Todd is absolutely right, though. It's a very Salty Rightie thing to do to come in an attack a woman with some serious musical awards and accomplishments and say just because he didn't like her, she's no good. Anyone pulling this crap right now really looks defeated, humiliated, and just plain utterly SAD, a sad sack of a bitter and scorned rightie angry that a pretty girl rejected their Emprah and endorsed the other side.