BN Lost Again - WHY ?????

Since PRU 12,all the by elections except for Sarawak all held in Peninsula BN had lost.
The question is why????

1.Was the power transition does not convince the electorates?
2.Was the result derived from UMNO AGM influenced the voters?
3.Was the opposition able to shed light at the end of a tunnel?
4.Did the opposition won on sympathy votes over the Perak political crisis?
5.Was BN not convincing enough to woo the minority groups?
and many more if one need to analyze.

Hope the loser will check their backyard and the victorious deliver what you have manifested.