The Left would think America was great if we gave up border security and made breaking into our country perfectly legal, tax payers were forced to pay for everything have nots want and on and on and on.
Perhaps this says it best.
"At the core of liberalism is the spoiled child — miserable, as all spoiled children are, unsatisfied, demanding, ill-disciplined, despotic and useless. Liberalism is a philosophy of sniveling brats." ― P.J. O'Rourke
PJ is right. Also, notice the spread of the numbers. Republicans have the least variation, with the lowest being 64 and the highest 86 (22 pts.) Independents are a little variable, 41 to 65 (24 pts). But Democrats are practically bipolar, with a spread from 22 to 65 (43 pts.) They are truly unstable people.
Oddly, the pride-in-country stat for Dems through the 0bama years suggests that no matter what, Democrats would not think America great. That tells you something, not about the country, but about the "strategy" and purpose of becoming and staying a Democrat. The party has collected people whose purpose is disapproval and betrayal of their duty to their country and their fellow men. That's all. Note that the demands and the terms change continually, but the Democratic need for destruction remains.