What about it sucks? Maybe it's not for you, but to say it sucks sounds pretty ignorant coming from somebody that more than likely has no musical abilities and lacks any sort of creativity in anything they do.. She can sing, she writes and produced her own music, she's in charge of her whole image. She is her own entity, and that's an extreme rarity today. Her music is nowhere near my favorite, but I recognize that she is an extremely talented person and she writes good pop music. Stop being biased and see things for what they are.
To me what makes me think it sucks is the fact that a singer who's songs has become highly popular while it mostly sounds like a song put together with a bad beat, some bad lyrics and a somewhat average voice at best then put on repeat numerous times throughout the song to create what goes on to become a world acknowledged hit played across the music channels atleast 3-6 times a day (yes her songs are played atleast 3 times MINIMUM a day in Denmark)
Yes I do admit I do not like her music, and I'll certainly let my personal opinion get in the way of me judging her, because it's all I have to judge from, and the fact that I've heard an acoustic performance of the song "Poker Face" performed on the radio, which quite frankly managed to sound nearly worse than the actual original song, which still makes me want to turn off the radio.
And yes fair enough, she writes her own music, but she certainly aint the first, and won't be the last one to be doing exactly that, and she's certainly not the greatest performer to have done that neither (don't ask me to name some unless you wanna wait a few hours for me to sit around and verify the fact that yes that singer was most definatly better than Lady Gaga and that singer most definatly wrote his or her own songs)