Yes, of course. Over, say, the last 50-100 years it has moved steadily to the left. You only have to compare today with fifty or a hundred years ago to see that. Things like premarital sex, single mothers, homosexuality, same-sex marriage, marijuana use, more 'display' of flesh (thinking of bathing suit styles), have become acceptable during that time in ways that never would have been tolerated before.
As for these people who talk about "bad liberalism", that's entirely subjective. Liberalism has been a good force in society for hundreds of years; liberalism freed the slaves, got women the vote, fought for black civil rights, etc., all things that (I believe) very, very few people would say were bad. Now it may well be that there are ideas that are though of as liberal today that are not (or would not be) good for society (I can think of at least one). That doesn't make liberalism bad; it makes those ideas bad.
A much more likely reason is the increase in global education and knowledge. It's easy to think of (for example) homosexuals as being bad, evil people when you don't know any, and all you ever hear is how they hate everything good, want to destroy marriage and society and corrupt the youth. When you learn that there are homosexuals who are artists, cops, educators, and scientists, and (perhaps) the guy next door who you've always been friendly with, you start to think that it's pretty silly to think of them all as being bad or evil...and then you start to think that it's pretty silly to think of homosexuality itself being bad or evil.
I'm reminded of a passage in one of my all time favourite books, The Boys Of Summer, by Roger Kahn. The book's about the Brooklyn Dodgers of the 1950's, just before they moved from Ebbets field to LA. He talks about Jackie Robinson (of whom I'm sure you've heard) and how just his presence on the field, playing on an equal basis with white players and not just holding his own, but excelling, helped in eradicating racism. Robinson didn't make any speeches, no signs, no marches...he just did what white guys did, and did it as well as or even better than they did. And people started to think "hmmm...about those <insert traditional insults of black people like lazy, stupid, etc.> black people...have you seen Robinson? He's none of those things. Maybe black people in general aren't any of those things." A quote from the book: 'By applauding Robinson, a man did not feel that he was taking a stand on school integration, or on open housing. But for an instant he had accepted Robinson simply as a hometown ball player. To disregard color, even for an instant, is to step away from the old prejudices, the old hatred. That is not a path on which many double back.' And what Robinson did paved the way for Campanella, and others...and gradually even more racism was worn away. And the country drifted slowly toward the left in that respect.
The same is true of many societal aspects. Conservatives fight against it, and the society slowly drifts leftward nevertheless. That's how societies work.
