Fortunately I am quite lucky in picking albums but I guess that the worst one is probably Girl Who Got Away by Dido. I admit that I listened to it only once but it was sooo boring that I was praying that it would end soon.
Yours Truly was awful. Also Starz Dance of whatever.
Kiss
Any 1D album
Brinty Jean. All of her albums were pretty horrendous tbh.
MDNA
Bangerz
Me You & The Music (Jessica Sanchez) even tho I love her.