You mean the fully-clothed hugging-groping scene and the gasping black eye thing? Its a downgrade from ME1's kissing-groping and naked humping. Then again all romance in ME2 was as cringey as DAO's love scenes.
But the word "romance" is an odd thing to describe the relationship between Liara and Shepard and the best comparison I have was unfortunately, Twilight. An innocent naive girl from broken family who found herself enthralled by a mysterious sexy stranger who have the tendency to save her life in repeat. One of them was over a hundred years old youthful creature with the ability to read minds and like to stalk the other. In a very short time, while they barely knew each other and yet they became so devoted to each other to the extreme after a brief connection they had. They had various displays of affections that was should have been conventionally invasive and manipulative, but was very widely perceived as deeply romantic. One character was intended to be a self-insertion. And another was a sexual fantasy that came true. .. ..... .... .... .... *gasp* wait, I'm referring who and who again?
However, a well-written romance, should have a clear separation between love and infatuation. Liara display a lot of flagged behavior that was worrying and not many of us see repetitive invasion of privacy and displays of unsubtle emotional manipulation techniques as remotely flattering, especially with how the game was written to favor keeping her happy and Shepard being totally comfortable with all of it. Frankly, if all this is about "hating" than simply a character criticism, you would see a lot of one liner about how so and so is "ugly" and "boring" and "completely hate them" and "I always let them die", and you wouldn't see people exploring a character in details that people tend to overlook; like how a broken armor in a display case is deeply unnerving to people who don't romance her or want that attention from her. And I have romanced Liara.
In the end, it is all subjective. I really enjoy the Liara romance and, while I am no fan of Twilight, many people are. Apparently, that romantic angle is what many people want.