Why I dont like music?
I wouldn't call it a disorder, unless it significantly affects your life. Not enjoying music or not being able to produce music is known as "amusia". It probably has to do with differences in perceiving pitch [1]. It can also occur in people with recently fitted hearing aids or cochlear implants [2].

If you are interested in this, there is a chapter about cases of amusia in Oliver Sack's book Musicophilia [3].

References:
[1] Liu F, Patel AD, Fourcin A, Stewart L. (2010). Intonation processing in congenital amusia: discrimination, identification and imitation. Brain. 133(Pt 6):1682-93. doi:10.1093/brain/awq089
[2] Cooper, W., Tobey, E., &amp; Loizou, P. (2008). Music Perception by Cochlear Implant and Normal Hearing Listeners as Measured by the Montreal Battery for Evaluation of Amusia. Ear and Hearing, 29(4), 618. doi:10.1097/AUD.0b013e318174e787
[3] http://www.oliversacks.com/books-by-oliver-sacks/musicophilia/